Karson Milbrandt

Karson Milbrandt

22-Year-Old PitcherP
Miami Marlins AAA
2026 Fantasy Outlook
Milbrandt broke out in 2025, ending his age-21 season with a dominant two-start run at Double-A. He emphatically forced a promotion from High-A, as he struck out 26 while logging a 1.17 ERA and 0.85 WHIP in 15.1 innings over his final three starts for Beloit, including a 10-K, one-hit performance over five scoreless innings against a loaded High-A Wisconsin lineup. He struck out 10 with a 60 percent groundball rate in 10.2 innings at Double-A. Long known for his strong stuff (mid-90s fastball, strong curveball, cutter) and shaky command, Milbrandt's propensity to issue walks is still his biggest weakness, but his stuff has gotten so good that hitters typically can't get much done on their own. He didn't give up a home run after June 13 and had 80 strikeouts in 58 innings over that stretch. For the third year in a row, Milbrandt threw over 90 innings and under 100 innings. He'll likely spend 2026 refining his command and control across the top two levels of the minors. Read Past Outlooks
RANKS
Rest of Season From Preseason
Signed a $1.5 million contract with the Marlins in July of 2022.
Promoted to Triple-A
PMiami Marlins  AAA
June 1, 2026
Milbrandt has been promoted from Double-A Pensacola to Triple-A Jacksonville, Craig Mish of FanDuel Sports Network Florida reports.
Analysis
Milbrandt was fantastic at Pensacola, posting a 1.34 ERA, 1.00 WHIP and 70:17 K:BB through 47 innings to earn a promotion to the Marlins' top minor-league affiliate. With Robby Snelling (elbow) out for the season and Eury Perez (hamstring) and Janson Junk (shin) sidelined, the Marlins' rotation depth is running thin, giving the 22-year-old Milbrandt a chance to debut in 2026 if he pitches well at Jacksonville.
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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
 
 
-25%
BAA vs RHP
2026
 
 
-25%
BAA vs RHP
2025
No Stats
2024
No Stats
BAA Batters K BB H 2B 3B HR
Since 2024vs Left .182 15 5 4 2 0 0 0
Since 2024vs Right .136 24 3 2 3 0 0 0
2026vs Left .182 15 5 4 2 0 0 0
2026vs Right .136 24 3 2 3 0 0 0
2025vs Left 0 0 0 0 0 0 0 0
2025vs Right 0 0 0 0 0 0 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 Karson Milbrandt See More
Recent RotoWire Articles Featuring Karson Milbrandt See More
More Fantasy News
Could get call this summer
PMiami Marlins  AAA
May 29, 2026
Milbrandt could be an option to join the Marlins' rotation later this summer, Barry Jackson of the Miami Herald reports.
Analysis
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Not slowed by promotion
PMiami Marlins  AAA
September 15, 2025
Milbrandt has a 1.69 ERA, 1.13 WHIP and 10:4 K:BB in 10.2 innings across two starts for Double-A Pensacola.
Analysis
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Healthy again at High-A
PMiami Marlins  AAA
July 15, 2025
Milbrandt (arm) has posted a 3.42 ERA, 1.42 WHIP and 58:29 K:BB over 50 innings in 13 starts with High-A Beloit since being reinstated from the 7-day injured list April 17.
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Shelved at High-A
PMiami Marlins  AAA
Arm
April 8, 2025
High-A Beloit placed Milbrandt on the 7-day injured list Thursday due to fluid buildup in his right arm, Jim Callis of MLB.com reports.
Analysis
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Lands with Fish at pick No. 85
PMiami Marlins  AAA
July 18, 2022
The Marlins have selected Milbrandt with the 85th overall pick in the 2022 first-year player draft.
Analysis
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