Cooper Hjerpe

Cooper Hjerpe's 2026 season

In 2026, the season he made his MLB debut on September 6, Cooper Hjerpe made 4 appearances in relief for the St. Louis Cardinals. The left-hander worked 12⅓ innings with a 4.38 ERA and a 1.30 WHIP, striking out 15 (27.3 percent of batters) and walking 9 (16.4 percent). He was worth 0.1 fWAR.

Before his call-up, he posted a 0.95 ERA over 19 innings at Triple-A Memphis.