Scouting Report: Collin Kober
St Louis Cardinals | RP
Overall
Summary
Stephen Kolek was activated from the 15-day IL after suffering a Grade 1 left oblique strain during spring training. He completed four successful rehab starts at Triple-A Omaha (2.76 ERA, 14:4 K:BB ratio in 16.1 innings) and made his 2026 debut on May 5 against the Guardians, earning a win while allowing 3 runs on 4 hits with 0 walks and 3 strikeouts across 6 innings. Kolek demonstrates solid command with six pitches and previously posted a 1.91 ERA over 33 innings in 5 starts for the Royals last season.
Strengths
- Successful rehab assignment with strong 2.76 ERA at Triple-A
- Earned win in 2026 debut against Guardians
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