Dan Straily - The Miami pitching staff is going to be in trouble regardless of who is out there. This team lacks big league talent, and Dan Straily has been a fill-in piece for the Marlins. Straily struggled when healthy last season, after a decent 2017 season. He missed the last month of the season, and his oblique injuries make him a major question mark for the new season. Straily will rehab during the offseason, and will need to be checked upon for his status closer to Spring Training.
Caleb Smith - It sounds like Caleb Smith is going to be behind on his Spring Training process, after going under the knife for lat surgery. Smith will need to get healthy offseason in first before competing for the rotation spot he had last season. Smith showed flashes of solid off-speed pitches, but a heavy slider approach could have him with further arm problems down the line. Miami isn’t going anywhere fast, but trotting out below average starters is going to be bad for any team. Smith will need to come back strong over the offseason.
Back when the Marlins had a loaded staff, they battled some health issues. A.J. Burnett was one of them, who had elbow issues during the 2003 season. He ended up missing most of that season, and into some of the next. Ricky Nolasco and Josh Johnson both battled injuries their entire career, but it was Johnson who had the shortened career. It was unfortunate given his talent. When the Yankees sent Aaron Boone out after his heroics, he landed in Miami for a small time, but mainly was on the DL with knee surgery.
Continuing down the years, more injury problems occurred to Miami pitchers. Anibal Sanchez needed shoulder surgery, and ended up missing the 2008 season. He also battled shoulder problems in 2009 too. Nathan Eovaldi has battled arm injuries in his career, although he has eventually made it back to be a World Series champ. He had Tommy John twice in his career, but once was with Miami.
Back in 2013, their start outfielder Marcell Ozuna had to repair a torn ligament in his thumb, missing the second half of the season. It was shortly after that Christian Yelich joined him on the DL with back issues. Jose Fernandez had to have Tommy John surgery, but his death a few years later is the biggest tragedy to Miami and the game of baseball.