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COOPER HJERPE
COOPER HJERPE #56 - PITCHER - ST. LOUIS CARDINALS
#56 - PITCHER - ST. LOUIS CARDINALS
MLB > ST. LOUIS CARDINALS >

COOPER HJERPE NEWS

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Throws bullpen session Hjerpe (elbow) threw a bullpen session Tuesday, Daniel Guerrero of the St. Louis Post-Dispatch reports.
Impact It's the first time he's thrown from the mound since last April's Tommy John surgery. Hjerpe is aiming to make his season debut around mid-July. The left-hander collected a 3.27 ERA, 1.13 WHIP and 76:28 K:BB in 52.1 innings at Double-A Springfield in 2024.
3 DAYS AGO • ROTOWIRE
Aiming for mound work next week Hjerpe (elbow) is aiming to throw a bullpen session next week, Jeff Jones of the Belleville News-Democrat reports.
Impact Hjerpe played catch off the mound Monday, but a bullpen session next week would be his first since last April's Tommy John surgery. The left-hander was added to the Cardinals' 40-man roster over the offseason and is on track to return to game action around midseason. Hjerpe has collected a 3.38 ERA and 127:53 K:BB over 93.1 innings since St. Louis took him in the first round of the 2022 First-Year Player Draft.
FEBRUARY 16 • ROTOWIRE
Joins 40-man roster The Cardinals selected Hjerpe's (elbow) contract from Double-A Springfield on Tuesday, John Denton of MLB.com reports.
Impact Hjerpe is expected to miss the first portion of the 2026 season after undergoing Tommy John surgery in April, but the Cardinals will grant him a 40-man spot anyway to ensure he doesn't get selected by another club during the Rule 5 Draft. The 24-year-old lefty owns a 3.38 ERA and 1.18 WHIP across his minor-league career and will presumably return to Double-A once he's deemed fully healthy.
NOVEMBER 19, 2025 • ROTOWIRE
Undergoes Tommy John surgery Double-A Springfield transferred Hjerpe (elbow) from the 7-day injured list to the full season injured list Tuesday.
Impact Hjerpe recently underwent season-ending Tommy John surgery, which is certainly notable after the 24-year-old dealt with elbow issues last season and didn't pitch after July 2. He was given a clean bill of health over the offseason, but he'd yet to pitch in the minors early on this season. Hjerpe will miss another full season and has been limited to just 93.1 innings since being selected in the first round of the 2022 Draft.
APRIL 15, 2025 • ROTOWIRE
Out with undisclosed injury Double-A Springfield placed Hjerpe on the injured list with an undisclosed injury, Sam Dykstra of MLB Pipeline reports.
Impact He's missed a lot of time with elbow injuries since getting drafted in the first round of the 2022 First-Year Player Draft. Hjerpe's inability to handle a starter's workload thus far points to a future in relief. He had a 3.27 ERA, 1.13 WHIP and 76:28 K:BB in 52.1 innings (15 starts) at Double-A last year.
APRIL 4, 2025 • ROTOWIRE
Clean bill of health this spring Hjerpe (elbow) allowed one run over an inning of work in his Grapefruit League debut Tuesday versus the Blue Jays.
Impact Hjerpe didn't pitch after July 2 last season due to left elbow inflammation, but he had a normal offseason and entered Cardinals camp with a clean bill of health, Daniel Guerrero of the St. Louis Post-Dispatch reports. The lefty has had elbow issues in each of his two pro seasons and changed his diet this offseason with the goal of reducing inflammation and soreness in his body. Hjerpe had a 13 percent walk rate but also a 35.2 percent strikeout rate in his 52.1 innings between High-A Peoria and Double-A Springfield in 2024. He'll rejoin the Springfield rotation for the start of the 2025 campaign as he hopes to stay healthy and cut down on the free passes.
FEBRUARY 27, 2025 • ROTOWIRE
Shut down two more weeks Hjerpe will remain shut down for two more weeks while dealing with a left elbow injury, Daniel Guerrero of the St. Louis Post-Dispatch reports.
Impact Hjerpe hasn't pitched since July 2 and with two more weeks of down time, it would be a surprise if he's ready for game action before September. He had surgery last August to remove a loose body from his elbow, but the exact nature of the injury isn't clear this time around. Hjerpe has posted a 3.27 ERA and 76:28 K:BB over 52.1 innings covering 15 starts between the High- and Double-A levels in 2024.
JULY 29, 2024 • ROTOWIRE
Sidelined at Double-A Hjerpe was placed on the 7-day injured list at Double-A Springfield on July 9 with an undisclosed injury.
Impact He exited his July 2 start after two scoreless innings (39 pitches) despite having struck out three while allowing two hits and one walk, so he may have suffered the injury in that outing. Hjerpe has 17 strikeouts over 12 scoreless frames across his three most recent starts at Double-A after giving up five earned runs in 2.2 frames in his first start after getting promoted from High-A Peoria.
JULY 22, 2024 • ROTOWIRE
Sidelined at Double-A Hjerpe was placed on the 7-day injured list at Double-A Springfield on July 9 with an undisclosed injury.
Impact He exited his July 2 start after two scoreless innings (39 pitches) having struck out three while allowing two hits and one walk, so he may have suffered the injury in that outing. Hjerpe has 17 strikeouts over 12 scoreless frames across his three most recent starts at Double-A after giving up five earned runs in 2.2 frames in his first start after getting promoted from High-A Peoria.
JULY 22, 2024 • ROTOWIRE
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