The Cardinals may already have a bullpen fix sitting in Triple-A, and Cooper Hjerpe is forcing the conversation.
St. Louis’ first-round pick in 2022 has had his path slowed by injuries, but the stuff has never been in doubt.
When Hjerpe has been healthy enough to pitch, he has spent most of his time overwhelming hitters. He opened this season on the injured list, then needed only five outings at Double-A before moving up to Memphis, where he has taken another step forward.
The numbers at Triple-A jump off the page. In three starts for the Redbirds, Hjerpe owns a 0.79 ERA across 11.1 innings, and he has struck out 34.3% of the batters he has faced. His unusual delivery and arm angle have led to comparisons with Chris Sale, a big leap to make, but the strikeout production has been there all along.
That’s why the most realistic path for Hjerpe this season may not be in the rotation. There’s no reason to abandon his long-term starter track, but with where he is in his development and the way the Cardinals’ roster is set up, a bullpen look makes sense right now.
He’s already on the 40-man roster, which makes a promotion an easy move if St. Louis wants to make it.
Cardinals assistant general manager Rob Cerfolio addressed Hjerpe’s progress on 101 ESPN’s midday show BK & Ferrario and said the club hopes it is getting him ready to help the big-league team "later this year or early next season".
And the fit is obvious. Outside of Justin Bruihl, the Cardinals don’t have a left-handed reliever they can lean on with much confidence.
Hjerpe could fill that void, and his work against lefties this year suggests he’d do it with force. Of the 54 left-handed batters he has faced, only two have gotten hits, and those hitters have combined for a .047/.226/.047 slash line.
He has also struck out 44% of them.
Hjerpe is still too talented to box in as a reliever forever, especially coming off Tommy John surgery, but the end of the season is a logical time to let him face Major League hitters and get a read on what he can do in that setting. He could handle multi-inning work, long relief, or high-leverage spots with left-handed pockets.
For a Cardinals team still in the playoff chase and dealing with bullpen problems, Hjerpe looks like more than a prospect waiting his turn. He looks like a weapon they haven’t used yet. And with the Phillies carrying so many lefties in their lineup, the thought is there to make that move this weekend.
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