Kevin Defrank
17-Year-Old
Miami Marlins Rookie
2026 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
2026 Fantasy Outlook
Defrank logged a 3.19 ERA, 1.29 WHIP and 34:10 K:BB in 31 innings across 10 starts in the Dominican Summer League. Arguably the top pitching prospect from the DSL last year, the 6-foot-5 Defrank already touches triple digits with his fastball and features an advanced changeup to go with an average slider. Defrank, who signed with the Marlins for $560,000 on Jan. 15, 2025, has a chance to rocket up prospect lists this year if he stays healthy and throws enough strikes. Read Past Outlooks
Signed a contract with the Marlins in January of 2025.
Wowing in camp this spring
Defrank has regularly hit 100 mph with his fastball this spring while showing a potentially plus changeup and the makings of a quality slider or sweeper, Sam Dykstra of MLB.com reports.
Analysis
Still only 17 years old, Defrank has also impressed Marlins brass with his makeup and maturity. "I would say what excites me the most is how much he grew last year and how much I think we're going to see him grow again this year because of his discipline, his work ethic, and just the physicality that he gained," director of player development Rachel Balkovec said. "I think he's exploded onto the map." Given DeFrank's age, Miami will treat the right-hander with kid gloves in 2026 after he threw 31 innings in the Dominican Summer League last year, but he'll climb prospect lists quickly if he stays healthy and continues to refine his control and his arsenal.
Still only 17 years old, Defrank has also impressed Marlins brass with his makeup and maturity. "I would say what excites me the most is how much he grew last year and how much I think we're going to see him grow again this year because of his discipline, his work ethic, and just the physicality that he gained," director of player development Rachel Balkovec said. "I think he's exploded onto the map." Given DeFrank's age, Miami will treat the right-hander with kid gloves in 2026 after he threw 31 innings in the Dominican Summer League last year, but he'll climb prospect lists quickly if he stays healthy and continues to refine his control and his arsenal.
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Shines in DSL
Defrank logged a 3.19 ERA, 1.29 WHIP and 34:10 K:BB in 31 innings across 10 starts in the Dominican Summer League.
Analysis
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