Cooper Hjerpe speaks before MLB debut

Cooper Hjerpe made his MLB debut on September 6, 2026, contributing to a 10-8 victory for the Cardinals against the Rockies. The rookie pitcher delivered a flawless performance, retiring all 12 batters he faced. This effort, combined with Ivan Herrera's three hits and two RBIs, secured another Coors comeback win. Prior to the game, Hjerpe spoke with Post-Dispatch writer Derrick Goold, marking a successful start to his professional career in the major leagues.