Justin Martinez

Justin Martinez (born July 30, 2001, in Bonao, Dominican Republic) is a right-handed relief pitcher. His MLB debut date was July 7, 2023, and he has pitched in the majors as a bullpen arm, with a primary position of RP. Listed at 6-foot-3 and 180 pounds, Martinez wears jersey No. 63. In 2024, Martinez logged 64 regular-season appearances and 72.2 innings, producing a 2.477 ERA with 91 strikeouts and 8 saves. His run prevention was supported by a 2.588 FIP, 1.307 WHIP, and an 11.268 K/9, along with a 4.696 groundball-to-flyball ratio that reflected a ground-ball profile. In 2025 regular-season action (17 games, 15.1 innings), his Justin Martinez Stats included a 4.109 ERA, 12.913 K/9, 1.239 WHIP, and 5 saves, with opponents limited to a .135 batting average. Pitch tracking from that season shows elite velocity, including a 95.1 mph average pitch speed and a 102.4 mph max. His four-seam fastball averaged 99.8 mph, and his sinker averaged 99.4 mph, paired with a splitter that generated a 58.6% whiff rate. Martinez’s profile is captured in a Justin Martinez MLB profile focused on late-inning relief work and power pitching in high-leverage situations.