Yoenis Cespedes - The Mets are always an injury plagued team, and Yoenis Cespedes is going to be out as he deals with heel surgery that came later in the year. Cespedes is not due back until after the all-star break, and it is tough seeing him coming back ready to go at age 33. The Mets are in a transition, although to where is still the question, and Cespedes being out leaves a lot of power up for grabs in the middle of the lineup.
Travis d’Arnaud - We have yet to see Travis d’Arnaud go through a healthy season, and we are guessing the Mets are not expecting that anymore. d’Arnaud is expected to be ready by Opening Day, but that is no guarantee. The Mets have some backup catchers, but this is a position that has gone below average for many years in New York.
The Mets might be the most injury prone organization in the history of baseball, and especially over the last decade. Even looking back to their earlier years, things were tough. Cliff Floyd had to undergo surgery on his Achilles, while Mo Vaughn needed knee surgery the year after. Jose Reyes battled injury problems during both his stints with the Mets. Back in 2005, Mike Piazza had fractured his hand, causing him to miss the rest of the second half.
When Pedro Martinez went to New York, he tore his rotator cuff which derailed his time in New York. A young Jason Vargas also needed surgery to remove bone spurs in his left elbow. Moises Alou was rounding out his career in New York, but needed hamstring surgery in 2008, which caused him to miss the season. Any player that had a durable past then went to New York started to break down. Billy Wagner had to have elbow surgery in the 2009 season, which was a string of surgeries as Angel Pagan joined him.
Over the last few seasons you have had Zack Wheeler and Travis d’Arnaud go down with major injuries. Noah Syndergaard and Jacob deGrom are always teetering on borderline major injuries. Matt Harvey eventually played himself out of New York, although dealt with arm injuries when there.