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The Marlins reassigned White (oblique) to minor-league camp Tuesday.
White was a long shot to make the Opening Day roster, anyway, but a recent oblique strain sealed his fate. He is not expected to be game-ready until late March, so White could get a late start to the minor-league season. The top prospect collected a 2.31 ERA and 145:51 K:BB over 89.2 innings across three minor-league stops in 2025.
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Marlins' Thomas White: Tending to strained oblique
Rotowire
Marlins manager Clayton McCullough said Sunday that White has been diagnosed with a Grade 1 right oblique strain and won't return to game action for 3-to-4 weeks, Louis Addeo-Weiss of FishOnFirst.com reports.
Arguably the top pitching prospect in the Miami organization, White received an invitation to big-league camp but was always considered likely to open the season in the Triple-A Jacksonville rotation. The oblique injury, which White picked up Friday in his spring debut, will keep him out for the rest of the Grapefruit League slate. Assuming the estimated recovery timeline holds, White could still be ready to go when Jacksonville opens its season March 27, although he would likely need time to ramp up in extended spring training first.
Marlins' Thomas White: Joining Marlins in MLB camp
Rotowire
The Marlins have extended White an invitation to big-league camp during spring training.
White is only 21 years old and has made just two starts at the Triple-A level, so he's likely to begin the 2026 season back in the minors as he continues working on his control. That said, the lefty is one of the most exciting young pitching prospects in baseball and has a good chance to debut at some point during the upcoming season. White collected a 2.31 ERA with a whopping 145 strikeouts (and 51 walks) over 89.2 innings across three minor-league stops in 2025.
The Marlins promoted White from Double-A Pensacola to Triple-A Jacksonville on Monday, Kevin Barral of FishonFirst.com reports.
White earned the promotion following a dominant stint at Pensacola, where he held a 1.59 ERA and 75:24 K:BB over 45.1 innings covering 10 starts. Between Pensacola and High-A Beloit this season, the southpaw has collected a 2.13 ERA and 128:41 K:BB across 80.1 frames. White won't turn 21 years old until later this month and probably won't be under consideration for a major-league promotion until 2026, but he's established himself as one of the better pitching prospects in baseball.
Marlins' Thomas White: Fans career-high 14 at Double-A
Rotowire
White gave up two hits over five scoreless innings for Double-A Pensacola on Saturday, striking out 14 without walking a batter.
The 20-year-old southpaw set a new career high in Ks, and per Cole Weintraub of MLB.com, 13 of those strikeouts came in a 14-batter span -- something no major-league pitcher has done since 1961. White has a 2.25 ERA, 1.20 WHIP and 33:10 K:BB through 20 innings over five starts since getting promoted for Pensacola, and the Marlins' top pitching prospect may not be long for Double-A if he keeps dominating like this.
The Marlins promoted White from High-A Beloit to Double-A Pensacola on Monday, Christina De Nicola of MLB.com reports.
White missed some time at Beloit with a finger injury but has been excellent when healthy, posting a 2.83 ERA and 53:17 K:BB over 35 innings covering nine starts. He's been especially sharp since returning in late May following a brief stint on the 7-day injured list, turning in a 16:1 K:BB over 10 frames in three outings. White is one of the better left-handed pitching prospects in baseball and has now reached the Double-A level at 20 years of age.
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