Left-handed pitching prospect Thomas White is dealing with the first stage of his right oblique strain that will keep him out of the rest of Spring Training, according to a report from MLB.com’s Christina De Nicola. Louis Addeo-Weiss of Fish On First added that, according to manager Clayton McCullough, White felt uncomfortable during his spring debut and faces a three-to-four week timeline before returning to the mound.
It’s a disappointing setback for the 21-year-old, who was a first-round pick by the Marlins in the 2023 draft and in the years since has risen to become one of the best prospects in the entire game. After a solid season in the minors in 2024, White impressed in a big way in all 21 starts during the 2025 campaign. He pitched well in High-A to open the season and was quickly promoted to Double-A, where he posted a 1.59 ERA in 45 1/3 innings of work in 10 starts. He struck out 39.3% of his opponents against a 12.6% walk rate, leaving him with elite peripherals (2.24 FIP, 2.54 xFIP) to go with his impressive run prevention numbers.
That performance at Double-A earned White a brief look at Triple-A late in the season and an invitation to big league camp this spring. White struggled in his spring debut, as he gave up two runs on two hits and a walk while striking out one in his one inning of work. That performance was marred by what is now known to be an outing, and he will spend the rest of Spring Training focusing on fixing that problem with the hope that he will be healthy soon after the start of minor league games. While White was in camp with the Marlins, he never had a solid chance to crack the Opening Day roster because Sandy Alcantara, Eury Perez, Max Meyer, Braxton Garrett, Chris Paddackagain Janson Junk at least each is ahead of him on the depth chart at the moment.
That will definitely change this season, as long as White can stay healthy and build on last season. His two starts in Triple-A last year were a mixed bag; while striking out an absurd 42.5% of his opponents at level, he also walked an incredible 25%. Important conclusions can’t be drawn from a sample size of less than two innings, of course, but White walked 13.6% of his opponents in the minors last year and will need to tighten up his control at least before he can break into the majors and fulfill his promise as a possible future arm of the Marlins’ rotation.
Throughout the season, White figures to be joined in the Triple-A rotation by other top prospects Robby Snellingwho split last year between Double- and Triple-A and is also on the big league radar at some point this year. White and Snelling currently look locked in Miami at least on paper, but it’s an offseason trade Edward Cabrera again Ryan Weathers they helped wipe them out a bit, and the injury history of Garrett, Perez, and Alcantara suggests innings should be available for them when they’re ready to take the next step to the majors.
