Seth Martinez Stats & Bio | Red Sox Pitcher

About Seth Martinez

Seth Martinez serves as a pitcher for the Boston Red Sox, wearing jersey number 51. Standing 6'2" and weighing 200 pounds, Martinez brings athleticism and composure to the mound that reflect his strong collegiate background. Born on August 29, 1994, in Peoria, Arizona, he developed his foundation for baseball in the Southwest before honing his skills at Arizona State University, one of college baseball's most prestigious programs. Martinez has shown his value on the mound, recently delivering a scoreless performance, posting a 0.0 ERA across 2.0 innings of work. His ability to navigate lineups and keep opposing hitters off the board demonstrates the control and poise that earned him a spot in a storied franchise like Boston. Martinez continues to be a reliable arm in the Red Sox bullpen.

Updated: Mar 4, 2026