Gabe Mosser
Gabriel Michael Mosser
- Bats Right, Throws Right
- Height 6' 4", Weight 185 lb.
- School Shippensburg University of Pennsylvania
- High School Parkland High School (Allentown)
- Born June 8, 1996 in Allentown, PA USA
Biographical Information[edit]
Pitcher Gabe Mosser was drafted by the San Diego Padres in the 27th round of the 2018 amateur draft, out of Shippensburg University of Pennsylvania, a Division II school that has not produced a major league player in over a century. It's fair to say that he was not considered a hot prospect when he signed with the Padres, for what was a minimal bonus.
Starting his pro career with the Tri-City Dust Devils of the Northwest League in 2018, Gabe beat the odds by making it to AAA by 2024, when he spent an entire season with the El Paso Chihuahuas of the Pacific Coast League, going 7-7, 5.40 in 28 games (26 starts). El Paso is a hitter's paradise, so his elevated ERA must be taken with a grain of salt. That was his final season in the Padres' system, as that fall he signed a free agent contract with the Philadelphia Phillies, his hometown team. He split the 2025 season between the AA Reading Fightin Phils and the AAA Lehigh Valley IronPigs, going 6-9, 5.20 in 25 starts. It was his second straight season of showing some excellent durability, as after logging 133 1/3 innings in 2024, he ended up with 124 2/3 innings pitched that season.
In 2026, he changed organizations again, joining the Seattle Mariners who assigned him to the AAA Tacoma Rainiers to start the season. On April 2nd, he was involved in a rare pitching match-up when he started against El Paso and his former teammate Matt Waldron: both pitchers are knuckleballers, featuring the rate pitch as part of their arsenal, although Waldron throws it more often than Gabe. To give a sense of the match-up's rarity, the last major league game to have been started by rival knuckleball artists had been in 2000 and had featured Tim Wakefield and Steve Sparks.
Further Reading[edit]
- Jesse Borek: "What's better than one knuckleball starter? Dueling knuckleball starters! Former teammates Waldron, Mosser battle while accomplishing rare feat at Triple-A", mlb.com, April 3, 2026. [1]
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