Marlins promote Robby Snelling for MLB debut after dominant Triple-A run

Robby Snelling did not leave Triple-A with a question hanging over him. He left Jacksonville with a 1.86 ERA, 44 strikeouts in 29 innings and five no-hit innings in his last outing, the kind of run that made Miami’s move feel earned rather than exploratory.

The Marlins are sending the 22-year-old left-hander to the majors for his first start Friday night against the Washington Nationals at loanDepot park, a promotion that came after Chris Paddack was designated for assignment earlier this week. Clayton McCullough said Snelling won the job and was chosen over more experienced options Braxton Garrett, Bradley Blalock and Ryan Gusto.

That Triple-A line was not smoke and mirrors. Across six starts for Triple-A Jacksonville, Snelling went 3-1 with a 0.90 WHIP, a .116 opponent batting average and a league-leading strikeout total through that stretch. He was named International League Pitcher of the Week after his five no-hit innings, the latest sign that the stuff is playing and the results are backing it up.

Miami is also seeing the rebound it hoped for when it acquired Snelling from the San Diego Padres in July 2024 in the deal that sent Tanner Scott and Bryan Hoeing to San Diego. The Padres had drafted him 39th overall in 2022, and at the time of the trade he carried a 6.01 ERA and fading velocity. Since arriving in the Marlins system, he has turned that profile inside out.

Snelling led Miami minor leaguers in 2025 with 136 innings and 166 strikeouts, then was named the organization’s minor league pitcher of the year and added a minor league Gold Glove. That is a strong case for a debut, but the numbers say the immediate expectation should be more grounded: a live arm with a four-pitch mix, built around a four-seam fastball that sits just over 94 mph and a curveball that has driven most of his usage this season, with a changeup and slider in support.

The Marlins are asking him to step in now because the performance pointed here, not because the rotation ran out of ideas. Snelling becomes the fifth Marlins farmhand to get a major-league callup this week, and he is likely to work with Joe Mack, who recently reached the majors after catching him at Triple-A. One roster wrinkle remains: because Snelling stayed in the minors long enough this season, Miami will not earn an extra draft pick through the prospect promotion incentive program. What the club does get is a pitcher whose Triple-A run looked like the last stop before something bigger.