The 23-year-old was having a solid year before he went down with injury, carrying a career-low 3.10 ERA through 16 starts ...

Hjerpe earned a promotion from High-A to AA after posting a 3.35 ERA in 11 starts for A+ Peoria. While command can elude him at times, Hjerpe has 65 strikeouts in 45.1 innings of work overall this ...

St. Louis Cardinals No. 6 prospect, left-handed pitcher Cooper Hjerpe, recently underwent Tommy John surgery according to the team, sidelining him for the entirety of the 2025 season.

Oregon State left-handed pitcher Cooper Hjerpe is one of the funkiest pitchers in this year's draft and the Seattle Mariners have rumored interest in him at pick No. 21.

Hjerpe has a high strikeout rate and low walk rate, issuing just 23 free passes compared to the 14.3 strikeout-per-nine innings rate he compiled this year.

Cardinals pitching prospect Cooper Hjerpe does some long toss during camp for minor league players at the Cardinals spring training complex in Jupiter, Fla., on Tuesday, Feb. 21, 2023.

Oregon State pitcher Cooper Hjerpe throws out a pitch during the first inning against New Mexico State at the 2022 NCAA Corvallis Regional Friday, June 3, 2022, in Corvallis, Oregon.

Cardinals pitching prospect Cooper Hjerpe does some long toss during camp for minor league players at the Cardinals spring training complex in Jupiter, Fla., on Tuesday, Feb. 21, 2023.

Woodland High School pitcher Cooper Hjerpe attempted to throw his fourth consecutive no-hitter April 18. He didn’t get the no-no against Colusa, but Woodland won the game 6-5.

Cooper Hjerpe, a 2022 first-round selection, fired six no-hit innings Tuesday for the Single-A Peoria Chiefs against the Great Lakes Loons. Hjerpe struck out five hitters and issued just three ...

Beavers Cooper Hjerpe stays undefeated, Oregon State baseball beats Long beach State for 6th win in a row Updated: Apr. 16, 2022, 2:29 p.m. | Published: Apr. 17, 2022, 12:54 a.m.

Oregon State left-hander Cooper Hjerpe owns the third-most wins (nine) in the nation, boasts the fourth-most strikeouts (135) and has the 10th-best WHIP (0.88).