Sports betting has a language of its own, and it moves fast. This glossary collects every term you are likely to run into on a betting app or in a betting article, from the basics of a point spread to the advanced analytics sharp bettors use to price games. Terms are grouped by category and listed alphabetically inside each section, so you can jump straight to what you need.
New to sports betting? Start with Types of Bets and Odds & Lines. Already comfortable with the basics? Skip ahead to Advanced Stats & Analytics.
Glossary Contents
Types of Bets
These are the wagers you will find on a bet slip, from the three core markets every sportsbook offers to the exotics built on top of them.
- Alternate Line: A version of the standard spread or total offered at adjusted odds. Moving the number in your favor shortens the price; moving it against you lengthens it.
- Buying Points: A player paying an additional amount to receive half a point or more in his favor on a point spread game. Buying onto or off a key number costs the most.
- Double Bet: A wager for twice the size of one’s usual wager.
- Exotic: Any wager other than a straight bet or parlay. Props, futures, teasers and round robins all fall under this umbrella.
- First Half Bet: A bet placed only on the first half of the game. Sportsbooks also price second halves, individual quarters and periods the same way.
- Futures Bet: A bet on an event that will be decided further down the line, such as who wins a division, a conference or a championship. Prices move throughout the season as teams win, lose and suffer injuries.
- Grand Salami: The over/under total for how many points/goals/runs will be scored across all games in a specific league on a given day. Most common in MLB and NHL.
- Head-to-Head (Matchup): A bet on which of two competitors finishes better than the other, regardless of where either places overall. Standard in golf, NASCAR and DFS-style props.
- If Bet: Two or more wagers linked in sequence, where the second bet only goes into action if the first one wins or pushes. It caps your exposure compared with placing both bets outright.
- In-Play Bet (Live Betting): A bet made after a game has started, with odds updating in real time as the score, clock and situation change.
- Micro-Bet: A wager on a single small event inside a game, such as the result of the next pitch, drive or possession.
- Moneyline: A bet made on whether a team will win or lose outright with no point spread. The price reflects how likely each side is to win.
- Outright: A bet on who wins an entire event or competition rather than a single game. Standard format in golf, tennis, motorsports and soccer tournaments.
- Parlay: A bet with two or more selections in which every leg must win or cover for the bettor to win, in exchange for a higher payout. One losing leg kills the whole ticket.
- Pleaser: The opposite of a teaser. You move the line against yourself on every leg in return for a much larger payout.
- Point Spread: The predicted scoring differential between two opponents set by a sportsbook. The favorite must win by more than the number; the underdog can lose by less than it, or win outright.
- Prop Bet: A bet on something other than the outcome of a game, such as passing yards or points scored by an individual player. Player props focus on individuals; game props cover things like the first team to score.
- Round Robin: A series of three or more teams broken automatically into multiple smaller parlays, most often 2-team parlays. Not every selection has to win for the ticket to return something.
- Same Game Parlay (SGP): A parlay built entirely from markets within one game. Because the legs are correlated, the sportsbook reprices them, so an SGP pays less than the same odds combined across separate games.
- Straight Bet: A single wager on one outcome — a spread, moneyline or total. The most common bet type and the easiest to price.
- Total (Over/Under): The combined amount of points, goals or runs scored by both teams during a game. You bet whether the real result finishes above or below the posted number.
Odds, Lines & Line Movement
Everything to do with pricing: how odds are written, how sportsbooks make money on them, and why numbers move between the opener and kickoff.
- Against the Spread (ATS): The result of a bet including the point spread. A team’s ATS record tracks how often it covers, which is very different from its win-loss record.
- American Odds: The standard format at US sportsbooks. A minus number shows how much you must risk to win $100 (-150), a plus number shows what a $100 stake wins (+130).
- Betting Line: The point spread, money line, or total that a bet must cover to win.
- Circled Game: A game with reduced betting limits, usually because of injury uncertainty, unconfirmed lineups or extreme weather.
- Closing Line: The final line available before a game starts. It reflects all the money and information the market absorbed, which makes it the most accurate price of the day.
- Closing Line Value (CLV): The difference between the number you bet and the closing line. Consistently beating the close is the clearest evidence that a bettor has a real edge.
- Consensus: The share of bets or money on each side of a market across sportsbooks.
- Cover: The act of winning a point spread bet.
- Decimal Odds: The European format, showing the total return per unit staked including the stake itself. Odds of 2.50 return $2.50 for every $1 risked.
- Dime Line: A market where the gap between the favorite’s and the underdog’s moneyline is 10 cents, such as -130/+120. The tighter the gap, the cheaper the market is for the bettor.
- Even Money: A wager that pays out exactly the amount you bet. No “juice”. Written as +100 in American odds.
- Exposure: The maximum amount of money a sportsbook stands to lose on a game.
- Fractional Odds: The UK format, expressing profit relative to stake. Odds of 5/2 return $5 in profit for every $2 risked.
- Handle: The total amount of money wagered on a game.
- Hold: The percentage of total handle a sportsbook keeps once every bet has settled. Parlays and props carry a much higher hold than sides and totals.
- Hook: A half-point in the spread or total, as in -3.5. Losing by a hook is one of the most common bad beats in football.
- Implied Probability: The win probability built into a price. Odds of -150 imply roughly a 60% chance, before the sportsbook’s margin is stripped out.
- Implied Team Total: The points a single team is projected to score, derived from the game total and the spread rather than posted directly. Take half the total, then add half the spread for the favorite and subtract it for the underdog: a 47-point total with a 3-point favorite implies 25 for the favorite and 22 for the underdog. It is the starting point for team totals and most scoring props.
- Juice: The bookmaker’s commission, built into the odds on both sides of a market. The standard is -110 on a point spread, meaning you risk $110 to win $100. Also known as “vigorish” or “vig”.
- Key Numbers: The margins of victory that occur most often in a sport. In the NFL, 3 and 7 dominate, which is why moving a spread across them changes the price so much.
- Laying Points: Betting the favorite by giving up points.
- Limit: The most money a sportsbook will take on a single event. Limits are usually low when a line opens and rise as the market matures.
- Line Movement: Any change to a line after it opens, driven by betting volume, injury news, weather or lineup announcements.
- Line Shopping: Comparing the same market across multiple sportsbooks and betting the best available number. It is the simplest way for a recreational bettor to improve long-term returns.
- Linemaker: The person who establishes the betting lines for a sportsbook. Also called an oddsmaker.
- Look-Ahead Line: A line posted well in advance, often a week or more before the current slate of games finishes.
- Move the Line: A player pays an additional price to receive half a point or more in his favor on a point spread game. Same idea as buying points.
- No-Vig Odds: Odds with the sportsbook’s margin removed, showing the market’s true implied probability. Useful for judging whether a price at another book offers value.
- Odds: The price attached to an outcome. It expresses the likelihood of that outcome occurring and determines the payout.
- Off the Board (OTB): A game or market a sportsbook has pulled down and will not accept bets on, usually because of an injury or information the book cannot price yet.
- Opening Line: The first line a sportsbook releases for a game.
- Outlaw Line: The earliest line in sports betting. An overnight line, usually posted with low limits before the wider market has shaped it.
- Pick’em: When neither team is favored. The spread is a line of 0, so you simply pick the winner.
- Public Betting %: The percentage of public bettors on a particular bet. Used to “fade the public”. Ticket percentages and money percentages can point in opposite directions.
- Push: When the final result lands exactly on the number, nobody wins the bet and all stakes are refunded. Buying a half-point removes the possibility of a push.
- Reverse Line Movement: Betting line movement that contradicts the public betting percentages. This indicates that “sharp” money is taking the opposite of the public.
- Steam Move: When a line starts to move rapidly across multiple sportsbooks at once, usually due to heavy or coordinated betting on one side.
- Taking the Points: Betting an underdog against the spread.
- Taking the Price: Betting the underdog and accepting money odds.
- Vigorish: The bookmaker’s commission built into a market. Also known as “vig” or “juice”.
Strategy, Bankroll & Money Management
The terms that separate betting from guessing: how bettors size their wagers, measure results and look for an edge against the number.
- Arbitrage (Arbing): Backing every outcome of an event at different sportsbooks when the prices diverge enough to guarantee a profit whatever the result. Books limit accounts that do it consistently.
- Backdoor Cover: A meaningless late score that has no effect on who wins the game but flips the point spread result.
- Bad Beat: A bet that looks like a winner most of the game and loses in the end. Usually by a close score.
- Bankroll: The amount of money available for betting, kept separate from money you need for anything else.
- Bankroll Management: The system a bettor uses to decide stake sizes, most often a fixed percentage of the bankroll per wager. It is what keeps a losing run from ending your season.
- Chasing: Raising stakes to win back previous losses. It is the fastest way to turn a small downswing into a large one.
- Contrarian: A person who “fades the public” or bets “against the grain”. Takes the opposite of the majority of bettors.
- Edge: The advantage a bettor has before placing a wager, measured as the gap between their estimated probability and the one implied by the odds.
- Expected Value (EV): The average profit or loss a bet would produce if it were repeated indefinitely. A “+EV” bet is one priced better than its true probability.
- Fading: Betting against a team, a public consensus or another bettor’s pick.
- Flat Betting: Risking the same amount on every wager regardless of confidence level.
- Handicapper: A person who studies, researches, and wagers on sporting events.
- Hedge: Betting opposite of a previous bet to guarantee winning at least a small amount of money, or cutting losses. Common on futures tickets and long parlays.
- Kelly Criterion: A staking formula that sizes each bet according to the edge you believe you hold. Most bettors use half or quarter Kelly to smooth out the swings.
- Middle: When you bet on both sides of a game at different numbers and have an opportunity to win both bets if the result lands in between.
- Model: A statistical system that generates its own projections for a game so a bettor can compare them against the market price.
- Power Ratings: Numerical strength ratings for every team, used to produce a bettor’s own spread before looking at the sportsbook’s number.
- Press: To wager a larger amount than usual.
- Regression: The tendency of extreme results to drift back toward a team’s or player’s true level over a larger sample.
- ROI (Return on Investment): A performance measure used to evaluate the efficiency of a bet or a betting record. Profit divided by total amount risked, shown as a percentage.
- Scalping: Betting both sides of a market at different numbers to lock in a small guaranteed profit. A close cousin of arbitrage.
- Scouts: People who wait for what they consider an unusually strong wager.
- Units: A standard monetary measurement of how much you typically bet, usually 1-2% of a bankroll. Tracking results in units makes them comparable no matter the bankroll size.
- Value Bet: A wager where your estimated chance of winning is higher than the implied probability of the odds on offer.
- Variance: The natural swing of results around their expected outcome. Even a profitable bettor will have long losing stretches.
Sportsbooks, Promos & Bet Settlement
How the operators themselves work: account terms, the promotions they advertise, and the rules that decide how a bet is graded.
- Action: A bet or wager. In baseball it has a second meaning — a bet placed “on action” stands even if the listed starting pitchers change.
- Betting Exchange: A platform where bettors wager against each other instead of against a sportsbook, with the operator taking a commission on winnings.
- Bonus Bet (Free Bet): Site credit that returns only the profit if it wins, not the stake. A winning $50 bonus bet at +100 returns $50, not $100.
- Bookmaker: A place where a person can make a wager (also called bookie). Used interchangeably with sportsbook.
- Cash Out: A feature that lets you settle a bet early for a price the sportsbook offers. That price always includes a margin, so cashing out costs you expected value.
- Daily Fantasy Sports (DFS): Contests where entrants build rosters under a salary cap and win prizes based on real player performance. Regulated separately from sportsbooks.
- Dead Heat Rule: The settlement rule for ties in place markets, such as a golf top-10 finish. Your stake is divided by the number of tied players and only that portion is paid at full odds.
- Deposit Match: A promotion that matches a percentage of your first deposit in bonus funds, normally subject to a playthrough requirement.
- First Bet Offer: A welcome promotion that refunds a losing opening wager, usually in bonus bets rather than cash, up to a stated maximum.
- Geolocation: The technology a licensed operator uses to confirm you are physically inside a legal state before accepting a wager.
- Integrity Fee: A cut of betting handle that professional leagues pushed to receive from sportsbooks after PASPA fell in 2018, presented as funding for monitoring the integrity of their games. Most states rejected it outright, and where leagues did secure revenue it usually arrived through official data mandates rather than a straight fee.
- KYC (Know Your Customer): The identity verification a regulated sportsbook must complete before you can bet or withdraw funds.
- Limited Account: An account whose maximum stakes have been cut by the sportsbook, most often after a run of winning bets or arbitrage activity.
- No Action (Void): A bet that is cancelled and refunded, for example when a game is postponed or a listed pitcher is scratched.
- Odds Boost (Profit Boost): A promotion that raises the payout on a selected market above its standard price.
- Parlay Insurance: A promotion that refunds a parlay, normally in bonus bets, when a single leg is the only one to lose.
- Playthrough (Rollover): The total amount you must wager before bonus funds turn into withdrawable cash.
- Prediction Market: A regulated exchange where users buy and sell event contracts that settle at a fixed value if the outcome occurs. Prices are set by supply and demand between traders rather than by a bookmaker.
- Responsible Gaming Tools: Deposit limits, time-outs, cool-off periods and self-exclusion options that licensed operators are required to offer.
- Ticket: A sports wager, or the digital bet slip listing your selections and stake before you confirm it.
- Wager: A bet placed at a sportsbook.
Betting Slang & Types of Bettors
The vocabulary you will hear on betting podcasts, in group chats and on sportsbook Twitter.
- Beard: A “middle-man” who places a bet for someone else. Also known as “runner”.
- Buck: A bet of $100. Also called a “dollar”.
- Chalk: The favorite in a particular game. Opposite of underdog.
- Dime: A bet of $1,000.
- Dog: Also known as “underdog”. The team/player not expected to win the game/match, priced at plus-money odds.
- Favorite: The team/player expected to win a game/match, priced at minus odds.
- Field: In “prop bets” the field refers to an accumulation of all the teams or players that are not specifically listed.
- Lock: Slang for a bet someone considers a certainty. No such thing actually exists, and the word is a reliable warning sign in a pick seller’s pitch.
- Longshot: A team or horse perceived to be unlikely to win. A large “underdog”.
- Nickel: A bet of $500.
- Puppy: Slang term for “underdog”.
- Runner: A person who places bets for another person. Also known as “beard”.
- Sides: The names of the two teams playing. The underdog and the favorite, as opposed to the total.
- Square: A beginner sports bettor. Opposite of a “sharp”.
- Sweat: The tense stretch of watching a bet play out, especially one that comes down to the final minutes.
- Tail: To copy someone else’s bet, usually a capper or sharp you follow.
- Tout: A person who sells their picks or their sports betting expertise to others.
- Whale: A bettor who wagers unusually large amounts.
- Wiseguy: A well-informed handicapper. Often used interchangeably with “sharp”.
Sport-Specific Betting Terms
Every sport has markets and jargon that only exist inside it. Here is what changes once you move from one league to another.
Football Betting Terms (NFL & College)
- Anytime Touchdown Scorer: A prop that cashes if a player scores a touchdown at any point in the game.
- First Touchdown Scorer: A prop on which player scores the game’s opening touchdown. Long odds and high variance.
- Garbage Time: Late-game snaps after the result is effectively decided. It regularly flips spreads, totals and yardage props.
- Home-Field Advantage: The value assigned to playing at home inside a power rating. In the modern NFL it is typically worth somewhere between 1 and 2 points.
- Injury Designations: Questionable, doubtful and out. Late inactives, published roughly 90 minutes before kickoff, are a common driver of prop and total movement.
- Red Zone: The area inside the opponent’s 20-yard line. Red zone efficiency is a key input for touchdown props.
- Snap Count: How many plays a player was on the field for. The starting point for almost all player prop research.
- Survivor Pool: A season-long contest where you pick one winner per week and cannot use the same team twice. One loss usually ends your run.
Basketball Betting Terms (NBA & College)
- Back-to-Back (B2B): Games on consecutive nights. Rest, travel and rotation changes all move NBA numbers.
- First Basket: A prop on which player scores the opening field goal of the game.
- Load Management: Resting a healthy star, often announced shortly before tip-off. It can swing a spread by several points.
- Pace: The estimated number of possessions a team uses per 48 minutes. It is the single biggest driver of a game total.
- PRA: A combined prop covering a player’s points, rebounds and assists in one number.
- Rest Advantage: When one team has meaningfully more days off than its opponent.
- Team Total: An over/under on the points scored by one team rather than both combined.
Baseball Betting Terms (MLB)
- Bullpen Usage: How many relief innings a team has thrown recently. A depleted bullpen is a live angle on totals and late-inning markets.
- First Five Innings (F5): A bet settled on the score after five innings. It keeps the wager focused on the starting pitchers and removes bullpen risk.
- Listed Pitcher: A betting condition requiring both named starters to take the mound. If one is scratched, the bet is voided — unless it was placed “on action”.
- NRFI / YRFI: No Runs First Inning and Yes Runs First Inning. A prop on whether either team scores in the opening frame.
- Park Factor: A measure of how much a ballpark inflates or suppresses scoring. Coors Field and Oracle Park sit at opposite extremes.
- Runline: Baseball’s version of the spread, almost always set at 1.5 runs.
- Strikeout Prop: An over/under on how many batters a pitcher will strike out.
- Weather & Wind: Temperature, humidity and especially wind direction meaningfully change how far batted balls carry, which is why MLB totals move on the forecast.
Hockey Betting Terms (NHL)
- 60-Minute Line: A three-way moneyline settled on regulation time only, with the draw as a third option. It pays more than the standard moneyline because overtime is excluded.
- Empty Net: When a trailing team pulls its goalie for an extra skater. Late empty-net goals are a frequent cause of total and puck line beats.
- Power Play (PP%): How often a team scores with a man advantage. Special teams strength is a core input for NHL totals.
- Puckline: A term for the “spread” in a hockey game. Almost always 1.5.
- Shots on Goal Prop: An over/under on how many shots a skater records.
- Starting Goalie: The confirmed netminder. Goalie confirmations move NHL lines more than almost any other news, and some books void bets if the listed goalie changes.
Soccer Betting Terms
- 90 Minutes Rule: Standard soccer markets settle on regulation plus stoppage time only. Extra time and penalty shootouts do not count unless the market says so.
- Aggregate: The combined score across both legs of a two-legged tie.
- Anytime Goalscorer: A prop that cashes if a player scores at any point in the match.
- Asian Handicap: A goal handicap that eliminates the draw. Quarter lines such as -0.25 split your stake across two handicaps, so half can win while half pushes.
- Both Teams to Score (BTTS): A yes/no market on whether each side finds the net at least once.
- Clean Sheet: A team finishing the match without conceding a goal.
- Double Chance: A single bet covering two of the three possible results, at a correspondingly shorter price.
- Draw No Bet: A two-way market where your stake is refunded if the match ends level.
- Three-Way Moneyline (1X2): The standard soccer market with three outcomes — home win, draw or away win.
Golf Betting Terms
- Outright Winner: The golfer who wins the event.
- Round Leader: The golfer who leads after a particular round of the event.
- First Round Leader (FRL): A market on who tops the leaderboard after day one.
- Place Betting: Allows individuals to bet on a golfer finishing within the Top 5, Top 10, or Top 20 of an event. Ties are settled under the dead heat rule.
- Each-Way: A two-part bet — half the stake on the outright win, half on a top finish. The number of places paid varies by sportsbook.
- Make the Cut: A prop on whether a golfer survives the halfway cut and plays the weekend.
- Tournament Group: Betting on which player will achieve the highest placing at the end of the tournament from the group named.
- 2-Ball & 3-Ball Betting: Betting on which player will achieve the lowest score (from the stated players) over 18 holes.
- Ryder Cup: Golf event between USA golfers and European golfers, contested every two years in a match play format.
- Top 3, 5, 10, 25: Betting on a particular player to finish in either the top 3, 5, 10, or 25 at the end of the event.
NASCAR & Motorsports Betting Terms
- Win Outright: The winner of the race.
- Pole Position: The most favorable position at the start of a race. Typically on the inside of the front row, awarded on qualifying time.
- Fastest Lap Time: Quickest time around the track in one lap.
- Podium Finish: Placing first, second, or third in the race.
- Top 5 / Top 10 Finish: A market on a driver finishing inside a given position range, regardless of who wins.
- Stage Winner: NASCAR races are split into stages, and each stage is priced as its own market.
- Driver Matchups: Head-to-head results between two racers to see who finishes better.
- DNF (Did Not Finish): A driver who fails to complete the race because of a crash or mechanical failure. Some books offer DNF props directly.
- Manufacturer Betting: A market on which manufacturer — Chevrolet, Ford or Toyota — produces the winning car.
- Prop Bets: A bet on something other than the winner of the race.
Boxing & MMA Betting Terms
- Winner: The fighter who is victorious in the fight.
- Method of Victory: How the fighter won the match — knockout, technical knockout, submission or a decision.
- Total Rounds: An over/under on how long the fight lasts. The line is set at a number of rounds with a half-round marker to avoid a push.
- Go the Distance: A yes/no market on whether the fight reaches the final bell and goes to the scorecards.
- Round Betting: Picking the exact round in which the fight ends. Long odds, low hit rate.
- Decision Types: Unanimous, split and majority decisions, each priced as a separate outcome in method-of-victory markets.
- Draw: A fight scored level. It is usually available as a long-priced third option, and it voids two-way moneylines at many sportsbooks.
- Prop Bets: A bet on something other than the winner of the match.
Tennis Betting Terms
- Match Winner: The two-way moneyline on which player wins the match. There are no draws in tennis.
- Set Betting: Predicting the exact set score, such as 2-1 or 3-0.
- Games Handicap: Tennis’s version of the spread, applied to total games won rather than sets.
- Total Games: An over/under on how many games the whole match lasts.
- Retirement Rule: How a sportsbook settles a match a player abandons through injury. Rules differ by book — some need one completed set, others void everything.
- Break of Serve: Winning a game against the opponent’s serve. Break markets are a staple of tennis live betting.
Horse Racing Betting Terms
- Win, Place, Show: The three straight racing bets — first, top two and top three respectively.
- Across the Board: Three equal bets on the same horse to win, place and show.
- Exacta, Trifecta, Superfecta: Bets requiring you to pick the first two, three or four finishers in exact order.
- Daily Double / Pick 6: Multi-race bets where you select the winner of two or six consecutive races.
- Pari-Mutuel: Pool betting. All stakes go into a shared pool and the final odds depend on how the pool is divided, so your price can change after you bet.
- Morning Line: The track handicapper’s projected odds published before wagering opens.
- Scratch: A horse withdrawn before the race, which triggers a refund on affected bets.
- Furlong: One-eighth of a mile, the standard unit for measuring race distance.
Advanced Stats & Analytics for Bettors
Betting markets are increasingly priced off advanced metrics rather than box scores. These are the ones worth learning first, because each of them strips luck out of a result and gets closer to a team’s or player’s true level — which is exactly where value against a line comes from.
EPA (Expected Points Added) — Football
Expected Points Added measures how much a single play changed a team’s expected points. Every combination of down, distance and field position carries an expected points value; EPA is simply the difference between that value at the start of a play and at the end of it.
An offense starting at its own 25-yard line is worth roughly 1.06 expected points. If the first play gains 15 yards to the 40, that number rises to about 1.88 — an EPA of 0.82 for that snap. Sum every play and you get team EPA; divide by snaps and you get EPA per play, which correlates with winning far more strongly than total yards.
How bettors use it: compare a team’s record against its EPA per play. A team winning games while posting poor EPA numbers is a fade candidate once the market inflates its spread, and the reverse applies to teams underperforming their process. Two caveats: standard EPA models are not opponent-adjusted, and they credit defenses for unforced turnovers such as a botched snap, so treat single-game samples with care.
Expected Goals (xG) — Soccer & Hockey
Expected Goals assigns every shot a probability of being scored, between 0 and 1, based on the characteristics of the chance: distance, angle, body part, type of assist, whether it came on the counter, and how much defensive pressure the shooter faced. A tap-in from six yards might be worth 0.6 xG; a speculative effort from 30 yards might be worth 0.02.
Add up the shots and you get a team’s xG for a match. Comparing xG to actual goals tells you whether a scoreline reflected the run of play or a hot goalkeeper, a deflection and a bit of luck.
How bettors use it: xG is the cleanest available signal for goal-based totals, team totals and both-teams-to-score markets. A side creating 1.8 xG per game but scoring 0.9 is usually underpriced, since finishing regresses quickly, while a team massively outscoring its xG is riding variance that rarely lasts. Sample size matters — xG needs several matches before it says anything reliable.
xERA (Expected ERA) — Baseball
xERA is a Statcast-era pitching metric shown on the familiar ERA scale. Like FIP, it starts from strikeouts, walks and hit-by-pitches. The difference is what it does with balls in play: instead of ignoring them, xERA uses tracking data — exit velocity, launch angle and sprint speed — to estimate how much damage the contact a pitcher allowed should typically produce. In practice it translates the hitting metric xwOBA to the pitcher’s side and converts it to an ERA scale.
That matters because a hard-hit ball caught in a cavernous outfield still counts against a pitcher’s xERA, while a weak seeing-eye grounder that drives in a run barely registers. Defense, park quirks and luck largely wash out.
How bettors use it: compare xERA against ERA. Pitchers with a much higher ERA than xERA are candidates to improve, and the market often keeps pricing them off the noisier number. It also rewards genuine contact managers that FIP undervalues. Both figures sit side by side on FanGraphs, with the underlying batted-ball data on Baseball Savant.
FIP (Fielding Independent Pitching) — Baseball
FIP uses the ERA scale to reflect only the outcomes a pitcher directly controls: home runs, strikeouts, unintentional walks and hit-by-pitches. Balls in play are removed from the equation entirely, which strips out two big sources of randomness — where a batted ball happens to land, and the quality of the defense behind the pitcher.
A pitcher with a 4.00 FIP “should have” allowed roughly four earned runs per nine innings given neutral defense and neutral batted-ball luck. In reality ERA and FIP often diverge sharply. FIP’s main blind spot is that some pitchers really do have a repeatable talent for inducing weak contact, and by ignoring balls in play it never gives them credit for it.
How bettors use it: FIP is backward-looking, but it describes performance far better than ERA. When a starter’s FIP sits well below his ERA and the market is still grading him on the ERA, there is often value backing him or his team. It is available free on FanGraphs and Baseball Reference.
wRC+ (Weighted Runs Created Plus) — Baseball
wRC+ is the most complete single-number measure of a hitter’s offensive value. It weights every offensive event by the runs it actually produces — a home run counts for much more than a walk — then adjusts for ballpark and the league run environment, and finally rescales everything so that 100 equals league average.
The scale makes it unusually easy to read. A hitter at 150 has been 50% better than the average major leaguer; one at 80 has been 20% worse. Because of the park and era adjustments, you can compare a Coors Field hitter with one from Oracle Park, or a 2026 season with a 1998 season, without doing any mental math.
How bettors use it: wRC+ splits — versus left-handers, versus right-handers, over the last 30 days — are a fast way to evaluate a lineup against a specific starting pitcher, which feeds directly into team totals, run lines and first-five-innings markets.
Other Advanced Metrics Worth Knowing
Football
- DVOA: Defense-adjusted Value Over Average. Grades every play against a league-average baseline in the same situation, then adjusts for opponent quality.
- Success Rate: The share of plays that gain enough yardage to keep an offense on schedule. A useful consistency check on EPA, which a few explosive plays can distort.
- CPOE: Completion Percentage Over Expected. Measures a quarterback’s accuracy relative to the difficulty of the throws he attempted.
- PROE: Pass Rate Over Expected. Shows how pass-happy a play caller is relative to the game situation — a strong signal for pace and totals.
- ANY/A: Adjusted Net Yards per Attempt, a passing efficiency stat that accounts for touchdowns, interceptions and sacks.
Basketball
- Net Rating: Points scored minus points allowed per 100 possessions. The cleanest measure of team or lineup strength.
- True Shooting % (TS%): Shooting efficiency that accounts for threes and free throws, not just field goals.
- Usage Rate: The share of a team’s possessions a player finishes while on the floor. Essential context for scoring props when a teammate sits.
- PER: Player Efficiency Rating, a per-minute summary of a player’s box score production, set to a league average of 15.
- eFG%: Effective Field Goal Percentage, which credits a three-pointer as being worth more than a two.
Baseball
- WHIP: Walks and Hits per Inning Pitched. A quick measure of how many baserunners a pitcher allows.
- xwOBA: Expected Weighted On-Base Average. Estimates a hitter’s production from the quality of his contact rather than the outcomes he happened to get.
- BABIP: Batting Average on Balls in Play. Wild swings away from about .300 usually signal luck rather than skill.
- SIERA / xFIP: Fielding-independent pitching metrics that also normalize home run rate, making them more predictive than FIP over small samples.
- Barrel Rate: The share of batted balls hit with the exit velocity and launch angle combination that produces the best results. A leading indicator for power props.
- WAR: Wins Above Replacement, an all-in-one estimate of how many wins a player is worth versus a freely available substitute.
Hockey & Soccer
- Corsi: Shot attempt differential — shots on goal, missed shots and blocked shots. A proxy for puck possession.
- Fenwick: Corsi with blocked shots removed, generally treated as a slightly better predictor of future scoring.
- PDO: Shooting percentage plus save percentage. It trends toward 100, so extreme readings flag teams due for regression in either direction.
- GSAx: Goals Saved Above Expected. Isolates a goaltender’s performance from the quality of the chances he faced.
- xGA: Expected Goals Against, the defensive side of xG.
- PPDA: Passes Allowed Per Defensive Action. A soccer pressing intensity metric — a lower number means a more aggressive press.
