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Cooper Hjerpe

Cardinals
Number #56
Position SP
Bats L
Throws L
Age 25
Height 6' 3"
Weight 200 lbs
Birth Place Davis, CA
Born Mar 16, 2001

Key Insights

2026
The angle he throws from is unusual, and hitters notice

Hjerpe releases the ball from a submarine slot, about -10 degrees above horizontal and 2.6 feet to the first-base side of the rubber.

254 tracked release points, averaging 3.9 feet off the ground.
There is one pitch of his that keeps getting hit

Contact off Hjerpe's changeup leaves the bat at 86.4 mph, against 79.0 off his 4-seam fastball.

40 and 132 of them thrown.
One pitch of his runs sideways more than almost anyone's

Hjerpe's changeup moves 15.8 inches toward the first-base side, the biggest horizontal move in his arsenal.

40 thrown, averaging 81.0 mph.
When he falls behind, hitters know exactly what is coming

Behind in the count Hjerpe throws a fastball 71.8% of the time, against 51.4% when he is ahead.

71 pitches behind in the count, 74 ahead.
His fastball is the pitch everything else is built on

Hjerpe's 4-seam fastball averages 90.4 mph, and has touched 92.8.

132 thrown, 52% of his pitches.
This is the pitch he goes to when he needs the out

With two strikes Hjerpe goes to the changeup: 23.4% of his two-strike pitches, against 11.2% the rest of the time.

94 two-strike pitches in 2026.

Movement Profile (Induced Break)

Catcher's Perspective • Pitch movement relative to a spinless ball

Player Bio Data
DOB Mar 16, 2001
Birth Place Davis, CA
Height 6' 3"
Weight 200 lbs LBS
Bats/Throws L/L
College/Draft Oregon State