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Stephen Kolek
#
32
Team
KC · P
Debut
2024 · 3 MLB seasons

Stephen Kolek

Age 29
Contract Value $786,806/yr
Size 6' 3" · 210
Throws RHP
Bats Right
From Houston, TX
4-3 W-L
4.50
ERA
1.24
WHIP
5.7
K/9
2.0
BB/9
54.0
Innings
10
Starts
60-day ILStephen Kolek is on the injured list since Jul 22, 2026.
Stephen Kolek season snapshot
Season stats
ERA
4.50
WHIP
1.24
K/9
5.7
BB/9
2.0
HR/9
1.33
IP
54.0
GS
10
W-L
4-3
◆ Pitcher snapshot

Stephen Kolek, a starter for the Kansas City Royals, has worked through 10 starts and 54.0 innings while posting a 4.50 ERA, 1.24 WHIP, and 4-3 record. The right-hander has shown an ability to keep his team in games when he is locating well, even if the overall profile leans more on contact management than overpowering bat-missing stuff.

His strikeout rate sits at 5.67, so his margin can be thinner than that of higher-whiff arms, but the control has helped stabilize outings, with a 2.00 walk rate that points to solid strike-throwing. Because he throws R, his success tends to depend on getting ahead, limiting free passes, and avoiding too much hard contact when hitters force him into the zone.

Recent form:

Recent starts
  • 07/022.0 IP · 3 ER · 0 K
  • 06/211.2 IP · 9 ER · 0 K
  • 06/147.1 IP · 0 ER · 4 K
  • 06/095.0 IP · 1 ER · 3 K
  • 06/037.0 IP · 2 ER · 8 K

Stephen Kolek has pitched through a volatile stretch lately, and the recent trend is up. That kind of swing can happen with pitchers who rely on execution and sequencing, so the key is whether he can quickly regain feel and work deeper into games after shorter or rougher appearances.

Going forward, he looks like a pitcher whose value is tied to efficiency, matchup management, and keeping traffic under control rather than piling up strikeouts. If the command remains sharp, he can provide useful innings and give the rotation steadiness, but any slippage in location can raise the risk level because there is less swing-and-miss cushion in the profile.

Key facts
ERA 4.50WHIP 1.24K/9 5.67W-L 4-3
Stephen Kolek ERA trend
Last 6
Earned runs per start
Avg 3.2 ER / start
⚡ Alternating good/bad starts — volatile pattern.

Stephen Kolek game log

2026 season
DateOpponentIPHERKBBERA
Jul 2Tampa Bay Rays2430113.50
Jun 21St. Louis Cardinals1.2990167.50
Jun 14Houston Astros7.150410.00
Jun 9Texas Rangers581311.80
Jun 3Cincinnati Reds762822.57
May 29Texas Rangers564517.20
May 23Seattle Mariners940210.00
May 17St. Louis Cardinals6.140310.00
May 12Chicago White Sox4.2556310.71
May 5Cleveland Guardians643304.50

Stephen Kolek season splits

Home / away / vs L-R · 2026
Home ERA
ERA4.65
Away ERA
ERA4.30
vs Left AVG
AVG0.273
vs Right AVG
AVG0.247
Stephen Kolek monthly splits
ERA · IP · K · BB · WHIP per month
MonthGSERAIPKBBWHIP
May53.4831.01960.94
Jun45.1421.01551.57
Jul113.502.0012.50
Pitch arsenal
Usage and average velocity · 2026
FFFour-seam FB
28.3%94.3 mph
SISinker
21.7%93.7 mph
SLSlider
16.4%85.6 mph
FCCutter
12.3%90.3 mph
CHChangeup
11.9%87.1 mph
STSweeper
9.3%79.9 mph

Performance vs teams

2026 starts · sorted by ERA

Hot / Cold zones

Opponent results by strike zone area

AVG by zone

  • Zone 01: .250
  • Zone 02: .385
  • Zone 03: .000
  • Zone 04: .238
  • Zone 05: .414
  • Zone 06: .455
  • Zone 07: .231
  • Zone 08: .353
  • Zone 09: .190
  • Zone 11: .111
  • Zone 12: .500
  • Zone 13: .231
  • Zone 14: .083

OPS by zone

  • Zone 01: .500
  • Zone 02: 1.231
  • Zone 03: .000
  • Zone 04: .762
  • Zone 05: 1.310
  • Zone 06: 1.364
  • Zone 07: .462
  • Zone 08: .765
  • Zone 09: .429
  • Zone 11: .571
  • Zone 12: 1.000
  • Zone 13: .533
  • Zone 14: .310

SLG by zone

  • Zone 01: .250
  • Zone 02: .846
  • Zone 03: .000
  • Zone 04: .524
  • Zone 05: .897
  • Zone 06: .909
  • Zone 07: .231
  • Zone 08: .412
  • Zone 09: .238
  • Zone 11: .222
  • Zone 12: .500
  • Zone 13: .231
  • Zone 14: .083

OBP by zone

  • Zone 01: .250
  • Zone 02: .385
  • Zone 03: .000
  • Zone 04: .238
  • Zone 05: .414
  • Zone 06: .455
  • Zone 07: .231
  • Zone 08: .353
  • Zone 09: .190
  • Zone 11: .429
  • Zone 12: .667
  • Zone 13: .333
  • Zone 14: .241

numberOfStrikes by zone

  • Zone 01: 38.00
  • Zone 02: 37.00
  • Zone 03: 28.00
  • Zone 04: 39.00
  • Zone 05: 28.00
  • Zone 06: 31.00
  • Zone 07: 20.00
  • Zone 08: 19.00
  • Zone 09: 31.00
  • Zone 11: 16.00
  • Zone 12: 11.00
  • Zone 13: 15.00
  • Zone 14: 47.00

earnedRunAverage by zone

  • Zone 01: -
  • Zone 02: -
  • Zone 03: -
  • Zone 04: -
  • Zone 05: -
  • Zone 06: -
  • Zone 07: -
  • Zone 08: -
  • Zone 09: -
  • Zone 11: -
  • Zone 12: -
  • Zone 13: -
  • Zone 14: -

numberOfPitches by zone

  • Zone 01: 45.00
  • Zone 02: 51.00
  • Zone 03: 39.00
  • Zone 04: 60.00
  • Zone 05: 56.00
  • Zone 06: 54.00
  • Zone 07: 31.00
  • Zone 08: 36.00
  • Zone 09: 49.00
  • Zone 11: 136.00
  • Zone 12: 46.00
  • Zone 13: 64.00
  • Zone 14: 170.00
0.4000.3000.200
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