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Scouting Report
Updated May 19, 2026
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
- + Excellent command with six-pitch arsenal
- + Solid track record: 1.91 ERA in 33 innings last season
- + Low walk rate (0 walks in debut, 4 walks in 16.1 rehab innings)
- + Cleared medical evaluation and activated from IL
Weaknesses
- - Recent Grade 1 oblique strain (spring training)
- - Limited strikeout generation (3 K in 6 innings in debut)
- - Doesn't possess elite stuff
- - Roster uncertainty - may not remain in rotation if Noah Cameron returns healthy
- - Only generated 2 whiffs on 83 pitches in debut
Injury Status: day-to-day
About
Collin Kober is a rp for the St Louis Cardinals.
Player Overview
RP
St Louis Cardinals