Thomas White

Thomas White

21-Year-Old PitcherRP
Miami Marlins AAA
2026 Fantasy Outlook
White's control is pretty shaky, but everything else about the 6-foot-5 southpaw screams front of the rotation. He climbed from High-A to Triple-A in his age-20 season, logging a 2.31 ERA, 1.18 WHIP and 145:51 K:BB in 89.2 innings. White, who received a $4.1 million bonus out of high school in 2023, walked 10 batters in 9.1 innings at Triple-A to close 2025, but he also struck out 17 in those two starts. He touches the upper 90s with his fastball, which has excellent movement, but his plus heater might be his third-best pitch. White's 70-grade sweeper is one of the best pitches in the minors and works against righties and lefties, while his changeup took a big step forward in 2025 as a plus weapon against righties. The Marlins always seem to have plenty of pitching, but White is the team's top prospect and he'll likely be up this summer if he gets the walks under control. Read Past Outlooks
RANKS
Rest of Season From Preseason
#410
ADP
Signed a $4.1 million contract with the Marlins in July of 2023.
Ready to join Triple-A club
PMiami Marlins  AAA
Oblique
April 13, 2026
White (oblique) will be activated from Triple-A Jacksonville's 7-day injured list to make his season debut with the affiliate Thursday, FishOnFirst.com reports.
Analysis
White was shelved after suffering a Grade 1 right oblique strain in spring training, but he's received the green light to rejoin the Triple-A club after completing a pair of rehab starts at Single-A Jupiter. The 21-year-old lefty built up to 3.2 innings and 63 pitches in his most recent outing with Jupiter on Thursday, allowing an unearned run on one hit and five walks while striking out six. If White can stay healthy and show improved control at Jacksonville, he should get the chance to make his MLB debut at some point later this summer.
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Pitching Stats
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Minor League Game Log
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Minor League Left/Right Pitching Splits (AAA)
Since 2024
 
 
-100%
BAA vs LHP
2026
 
 
-100%
BAA vs LHP
2025
 
 
-100%
BAA vs LHP
2024
No Stats
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .000 21 10 3 0 0 0 0
Since 2024vs Right .192 33 15 7 5 1 0 1
2026vs Left .000 9 6 0 0 0 0 0
2026vs Right .400 5 2 0 2 0 0 1
2025vs Left .000 12 4 3 0 0 0 0
2025vs Right .143 28 13 7 3 1 0 0
2024vs Left 0 0 0 0 0 0 0 0
2024vs Right 0 0 0 0 0 0 0 0
Prospect Rankings History
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Recent RotoWire Articles Featuring Thomas White See More
Recent RotoWire Articles Featuring Thomas White See More
2025 Fantasy Outlook
A high-pedigree southpaw who received $4.1 million from Miami in 2023 after sliding to pick No. 35, White improved his prospect stock throughout the 2024 season while showcasing one of the best sliders in the minors. White threw exactly five innings in each of his final eight starts for High-A Beloit, logging a 2.25 ERA, 1.13 WHIP and 42 strikeouts in 40 innings over that stretch. The lanky 6-foot-5 lefty seemingly got better as the season went on, logging a 2.61 ERA, 1.16 WHIP and 21.7 K-BB% in 13 starts at High-A after logging a 3.18 ERA, 1.59 WHIP and 17.2 K-BB% in eight starts for Single-A Jupiter to begin the year. His mid-90s fastball has great movement and gives him another easy plus pitch, while his changeup is a very good third pitch. White has long limbs and has struggled to throw strikes at times, but he showed impressive consistency down the stretch. He may head to Double-A for the beginning of his age-20 season, and if he throws enough strikes, he could finish 2025 as a top-five pitching prospect in baseball.
More Fantasy News
Another rehab start on tap
PMiami Marlins  AAA
Oblique
April 6, 2026
White (oblique) will make his second rehab start for Single-A Jupiter on Wednesday.
Analysis
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Cut from big-league camp
PMiami Marlins  AAA
Oblique
March 3, 2026
The Marlins reassigned White (oblique) to minor-league camp Tuesday.
Analysis
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Tending to strained oblique
PMiami Marlins  AAA
Oblique
March 1, 2026
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.
Analysis
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Joining Marlins in MLB camp
PMiami Marlins  AAA
January 29, 2026
The Marlins have extended White an invitation to big-league camp during spring training.
Analysis
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Bumped up to Triple-A
PMiami Marlins  AAA
September 1, 2025
The Marlins promoted White from Double-A Pensacola to Triple-A Jacksonville on Monday, Kevin Barral of FishonFirst.com reports.
Analysis
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