Cooper Hjerpe Stats & Scouting Report

IP	37.2
ERA	3.35
WHIP	1.19
BB/9	4.78
SO/9	13.38

Full name Cooper Austin Hjerpe
Born 03/16/2001 in Davis, CA
Profile Ht.: 6'3" / Wt.: 200 / Bats: L / Throws: L
School Oregon State
Drafted in the 1st round (22nd overall) by the St. Louis Cardinals in 2022 (signed for $3,182,200).

View Draft Report

Ten years ago, a player like Hjerpe likely would have been viewed as much less impressive than he is in 2022—even as one of the best starting pitchers in college baseball. A 6-foot-3, 200-pound lefthander, Hjerpe has dominated this spring and posted a 2.45 ERA over 16 starts and 95.2 innings, while striking out 39.7% of batters faced and walking just 5.3%. He’s dominated every lineup he’s faced despite throwing a fastball that averages just 90-91 mph. The key to Hjerpe’s success is a unique, 52-54-inch release height created by a sidearm slot that makes everything he throws play up. His vertical approach angle is elite, and while Hjerpe touches just 94-95 mph at peak, he generates plenty of whiffs with his fastball, especially at the top of the zone. When hitters do make contact, he has been difficult to elevate and allowed just three home runs this spring through those 95.2 innings of work. Entering the year, scouts questioned Hjerpe’s secondaries, and his lower arm slot made some evaluators wonder if he would ever be able to get to a consistent breaking pitch, but his secondaries have improved this spring. His slider is a fringy and slower breaking ball in the upper 70s that gets whiffs more because of his unique angle than the shape and velocity of the pitch, but that has still meant a close to 50% whiff rate. His upper-70s changeup gets average to above-average grades and does have plenty of velocity separation from his fastball. On top of excellent deception, Hjerpe is a refined and polished strike thrower who has above-average command (his 7.50 strikeout-to-walk ratio was a top-20 rate among Division I arms) that should be more than enough to profile in a back-of-the-rotation starting role. It wouldn’t be a surprise if some teams liked the idea of putting Hjerpe in the bullpen, where he could move quickly, and where his unique release point and arm angle would be a nightmare for hitters. Model-driven teams are likely highest on Hjerpe, whose performance and pitch data give him a chance to be the first college pitcher selected in a light year for four-year arms.

Top Rankings

Organization Prospect Rankings

BA Grade/Risk: 50/High.

Track Record: After leading the nation in strikeouts in 2022 at Oregon State, Hjerpe went to the Cardinals 22nd overall and signed for $3.18 million. He debuted the following spring but was limited to just eight starts after surgery to remove loose bodies from his left elbow. Hjerpe began 2024 healthy, making 11 starts with High-A Peoria and pitching well enough to earn a promotion to Double-A Springfield in June. Hjerpe made four starts at Double-A before being shut down with an elbow injury. Hjerpe has pitched just 93.1 pro innings.

Scouting Report: A sidearming lefthander, Hjerpe has an unusual look and angle on his pitches that allows them to play well above their raw velocity. He mixes a fastball, curveball, cutter and changeup, each moving in different directions with well-defined shapes. Hjerpe’s fastball sits 90-92 mph and touches 94 at peak. The velocity is ordinary, but the pitch’s unusually flat approach angle makes it stand out. He releases the ball from a 4-foot-1 height with above-average extension, giving hitters a truly unique experience. Hjerpe’s cutter has become his most-used secondary pitch. Sitting 85-87 mph, the pitch doesn’t generate lots of whiffs, but it gets weak contact and gives him a pitch that consistently lands in the zone. Hjerpe’s changeup is his primary weapon against righthanded hitters, and it performed well in 2024. His curveball is an upper-70s sweeper which plays well off of his trio of shapes. Hjerpe’s command has been up and down, but he has above-average zone rates on his fastball, cutter and changeup.

The Future: Hjerpe boasts the deep arsenal of a future back-end starter but has not shown the ability to stay healthy. The Cardinals will continue to develop him as a starter, but he could end up as a deceptive lefthanded reliever capable of getting four or more outs.

Scouting Grades Fastball: 55 | Curveball: 45 | Changeup: 55 | Cutter: 45 | Control: 50
BA Grade: 50/High

Track Record: Hjerpe led the nation in strikeouts as an Oregon State junior and intrigued analytically slanted front offices heading into the 2022 draft. He was drafted 22nd overall by the Cardinals and signed for $3.18 million. He was held out of play following the draft and debuted the following spring with High-A Peoria. After eight starts with Peoria, Hjerpe went down with an elbow injury on May 23. He had a procedure to remove loose bodies from his pitching elbow and did not return until early September, making two appearances with Peoria. Following the season, Hjerpe participated in the Arizona Fall League.

Scouting Report: Hjerpe’s sidearm slot is the defining characteristic of the lefthander’s profile and the driving force behind his outlier analytic traits. He mixes five pitches, but his primary mix consists of his fastball, slider and changeup. His fastball sits 88-90 mph and touches 91 at peak. While his velocity is well below-average, Hjerpe’s combination of unique release traits and fastball shape allows it to miss bats and generate whiffs in zone. His slider is his primary secondary pitch in left-on-left matchups, but is also effective when he backdoors it to righthanders. It’s a slower sweeper-style pitch that sits 77-79 mph. He can manipulate it for more depth and produce a slower curveball-like version of his breaking ball. He mixed in a cutter in the mid 80s in spurts, but it is a fairly new pitch. His command of his entire mix is strong and he showed a knack for not only strike-throwing but landing all of his pitches in the zone.

The Future: After an injury-plagued debut, Hjerpe will look to prove he can complete a season healthy in 2024. The traits that made him a viable first-round pick are still evident, and he projects as a No. 5 starter with unique deceptive traits that would work in relief.

Scouting Grades Fastball: 55 | Curveball: 40 | Slider: 50 | Changeup: 55 | Cutter: 40 | Control: 50
BA Grade/Risk: 55/High

Track Record: Hjerpe went undrafted out of high school in 2019 after a standout senior season with Woodland (Calif.) High that saw him toss four no-hitters. At Oregon State he worked as a reliever and made six appearances out of the Beavers' bullpen in 2020. He made the jump to the rotation as a sophomore in 2021 and made 16 starts with a respectable 4.21 ERA. Hjerpe used that summer to focus on improving his secondary offerings. What followed was a dominant junior season with Oregon State in 2022. He went 11-2, 2.53 and led the nation with 161 strikeouts. The Cardinals drafted Hjerpe 22nd overall and signed him for a slot bonus of $3.18 million.

Scouting Report: On the surface, Hjerpe has the look of an unusual lefty who gets by on his deceptive sidearm slot. While this is true in part, he projects for more power than a typical sidearmer. His four-pitch mix is heavily fastball-driven due to the unique characteristics generated by his 4.5-foot release height and--on average--6.5 feet of extension. This creates an outlier approach angle and plays up his average vertical break. While Hjerpe sits 90-92 mph and touches 94, his ability to command his fastball works in harmony with his deception to generate whiffs at the top of the zone. His primary secondaries are a sweepy slider at 77-79 mph and changeup at 79-82 with heavy tumble and fade. Both pitches generated whiffs last spring at a rate of 49% or better. Hjerpe will also mix in a curveball, which is a slower version of his slider with more depth. Hjerpe shows command for the entirety of his pitch mix and could continue to excel in a starting role should he add power to his fastball without compromising its shape.

The Future: While Hjerpe's profile is unusual, his combination of stuff, pitchability and projection gives him a chance to develop into a solid mid-rotation option who should move quickly.

Scouting Grades: Fastball: 60. Curveball: 40. Slider: 55. Changeup: 55. Control: 55

Draft Prospects

School: Oregon State Committed/Drafted: Never Drafted
Age At Draft: 21.4
BA Grade: 50/High
Scouting Grades: Fastball: 60 | Curveball: - | Slider: 50 | Changeup: 55 | Cutter: | Control: 60
Ten years ago, a player like Hjerpe likely would have been viewed as much less impressive than he is in 2022—even as one of the best starting pitchers in college baseball. A 6-foot-3, 200-pound lefthander, Hjerpe has dominated this spring and posted a 2.45 ERA over 16 starts and 95.2 innings, while striking out 39.7% of batters faced and walking just 5.3%. He’s dominated every lineup he’s faced despite throwing a fastball that averages just 90-91 mph. The key to Hjerpe’s success is a unique, 52-54-inch release height created by a sidearm slot that makes everything he throws play up. His vertical approach angle is elite, and while Hjerpe touches just 94-95 mph at peak, he generates plenty of whiffs with his fastball, especially at the top of the zone. When hitters do make contact, he has been difficult to elevate and allowed just three home runs this spring through those 95.2 innings of work. Entering the year, scouts questioned Hjerpe’s secondaries, and his lower arm slot made some evaluators wonder if he would ever be able to get to a consistent breaking pitch, but his secondaries have improved this spring. His slider is a fringy and slower breaking ball in the upper 70s that gets whiffs more because of his unique angle than the shape and velocity of the pitch, but that has still meant a close to 50% whiff rate. His upper-70s changeup gets average to above-average grades and does have plenty of velocity separation from his fastball. On top of excellent deception, Hjerpe is a refined and polished strike thrower who has above-average command (his 7.50 strikeout-to-walk ratio was a top-20 rate among Division I arms) that should be more than enough to profile in a back-of-the-rotation starting role. It wouldn’t be a surprise if some teams liked the idea of putting Hjerpe in the bullpen, where he could move quickly, and where his unique release point and arm angle would be a nightmare for hitters. Model-driven teams are likely highest on Hjerpe, whose performance and pitch data give him a chance to be the first college pitcher selected in a light year for four-year arms.

Scouting Reports

BA Grade/Risk: 55/High

Track Record: Hjerpe went undrafted out of high school in 2019 after a standout senior season with Woodland (Calif.) High that saw him toss four no-hitters. At Oregon State he worked as a reliever and made six appearances out of the Beavers' bullpen in 2020. He made the jump to the rotation as a sophomore in 2021 and made 16 starts with a respectable 4.21 ERA. Hjerpe used that summer to focus on improving his secondary offerings. What followed was a dominant junior season with Oregon State in 2022. He went 11-2, 2.53 and led the nation with 161 strikeouts. The Cardinals drafted Hjerpe 22nd overall and signed him for a slot bonus of $3.18 million.

Scouting Report: On the surface, Hjerpe has the look of an unusual lefty who gets by on his deceptive sidearm slot. While this is true in part, he projects for more power than a typical sidearmer. His four-pitch mix is heavily fastball-driven due to the unique characteristics generated by his 4.5-foot release height and--on average--6.5 feet of extension. This creates an outlier approach angle and plays up his average vertical break. While Hjerpe sits 90-92 mph and touches 94, his ability to command his fastball works in harmony with his deception to generate whiffs at the top of the zone. His primary secondaries are a sweepy slider at 77-79 mph and changeup at 79-82 with heavy tumble and fade. Both pitches generated whiffs last spring at a rate of 49% or better. Hjerpe will also mix in a curveball, which is a slower version of his slider with more depth. Hjerpe shows command for the entirety of his pitch mix and could continue to excel in a starting role should he add power to his fastball without compromising its shape.

The Future: While Hjerpe's profile is unusual, his combination of stuff, pitchability and projection gives him a chance to develop into a solid mid-rotation option who should move quickly.

Scouting Grades: Fastball: 60. Curveball: 40. Slider: 55. Changeup: 55. Control: 55
BA Grade/Risk: 55/High

Track Record: Hjerpe went undrafted out of high school in 2019 after a standout senior season with Woodland (Calif.) High that saw him toss four no-hitters. At Oregon State he worked as a reliever and made six appearances out of the Beavers' bullpen in 2020. He made the jump to the rotation as a sophomore in 2021 and made 16 starts with a respectable 4.21 ERA. Hjerpe used that summer to focus on improving his secondary offerings. What followed was a dominant junior season with Oregon State in 2022. He went 11-2, 2.53 and led the nation with 161 strikeouts. The Cardinals drafted Hjerpe 22nd overall and signed him for a slot bonus of $3.18 million.

Scouting Report: On the surface, Hjerpe has the look of an unusual lefty who gets by on his deceptive sidearm slot. While this is true in part, he projects for more power than a typical sidearmer. His four-pitch mix is heavily fastball-driven due to the unique characteristics generated by his 4.5-foot release height and--on average--6.5 feet of extension. This creates an outlier approach angle and plays up his average vertical break. While Hjerpe sits 90-92 mph and touches 94, his ability to command his fastball works in harmony with his deception to generate whiffs at the top of the zone. His primary secondaries are a sweepy slider at 77-79 mph and changeup at 79-82 with heavy tumble and fade. Both pitches generated whiffs last spring at a rate of 49% or better. Hjerpe will also mix in a curveball, which is a slower version of his slider with more depth. Hjerpe shows command for the entirety of his pitch mix and could continue to excel in a starting role should he add power to his fastball without compromising its shape.

The Future: While Hjerpe's profile is unusual, his combination of stuff, pitchability and projection gives him a chance to develop into a solid mid-rotation option who should move quickly.

Scouting Grades: Fastball: 60. Curveball: 40. Slider: 55. Changeup: 55. Control: 55
BA Grade: 50/High

August Update: Ten years ago, a player like Hjerpe likely would have been viewed as much less impressive than he is in 2022—even as one of the best starting pitchers in college baseball. A 6-foot-3, 200-pound lefthander, Hjerpe has dominated this spring and posted a 2.45 ERA over 16 starts and 95.2 innings, while striking out 39.7% of batters faced and walking just 5.3%. He&#39s dominated every lineup he&#39s faced despite throwing a fastball that averages just 90-91 mph. The key to Hjerpe&#39s success is a unique, 52-54-inch release height created by a sidearm slot that makes everything he throws play up. His vertical approach angle is elite, and while Hjerpe touches just 94-95 mph at peak, he generates plenty of whiffs with his fastball, especially at the top of the zone. When hitters do make contact, he has been difficult to elevate and allowed just three home runs this spring through those 95.2 innings of work. Entering the year, scouts questioned Hjerpe&#39s secondaries, and his lower arm slot made some evaluators wonder if he would ever be able to get to a consistent breaking pitch, but his secondaries have improved this spring. His slider is a fringy and slower breaking ball in the upper 70s that gets whiffs more because of his unique angle than the shape and velocity of the pitch, but that has still meant a close to 50% whiff rate. His upper-70s changeup gets average to above-average grades and does have plenty of velocity separation from his fastball. On top of excellent deception, Hjerpe is a refined and polished strike thrower who has above-average command (his 7.50 strikeout-to-walk ratio was a top-20 rate among Division I arms) that should be more than enough to profile in a back-of-the-rotation starting role. It wouldn&#39t be a surprise if some teams liked the idea of putting Hjerpe in the bullpen, where he could move quickly, and where his unique release point and arm angle would be a nightmare for hitters. Hjepre was selected with the 22nd overall pick and signed for $3,182,200.

Scouting Grades: Fastball: 60. Slider: 50. Changeup: 55. Control: 60.