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Cooper Hjerpe

STL · Low-A · Age 25 · 4.2 IP
LHP Low-A STL
7.71
ERA
Cooper Hjerpe is a 25-year-old LHP in the STL organization, currently at the Low-A level. Across 4.2 innings, Cooper has posted a 7.71 ERA with a 5.04 xFIP and 1.07 WHIP. The strikeout rate sits at 21.1% against a 10.5% walk rate, a 10.6% K-BB% and 7.6% swinging-strike rate.
On the Statcast side, the fastball averages 88.3 mph (topping at 94.5) with +5.7" of induced vertical break and a -4.65° vertical approach angle.
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Core Metrics
ERA
7.71
xFIP
5.04
K%
21.1
BB%
10.5
Command & Stuff
WHIP
1.07
K-BB%
10.6
SwStr%
7.6
IP
4.2
Statcast Fastball Profile
Velo
88.3
Max
94.5
IVB
+5.7"
VAA
-4.65°
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Data via ProspectTilt PitchIQ — live MiLB Statcast analytics.
Stats current as of June 27, 2026. Updated nightly.
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