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Stephen Kolek

#32 - Starting Pitcher

Kansas City Royals

Bats / Throws Right / Right
Date of Birth 4/18/1997 (29)
Height, Weight 6'3", 210 lb
Hometown Houston, TX

2026 Season Stats

MLB Rank MLB Average
W-L IP ERA WHIP K% BB%
4-2 52.0 4.15 1.19 16.0% 5.2%
74th 4
W
139th 67.0
IP
97th 4.41
ERA
60th 1.31
WHIP
167th 21.6%
K%
14th 8.6%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.1 9.7% 25.4% 48.6% 5.8% 5.01 2.95
110th 94.4
FB MPH
151st 11.5%
SwStr%
173rd 27.8%
CSW%
132nd 50.1%
Str-ICR
150th 4.9%
MTK%
73rd 4.98
PLV
45th 3.26
PLA
The List
Rank
96th

Articles

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Stephen Kolek Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L QS ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR% GB% SwStr% CSW% IPR% PLV
2024 SD 42 0 46.2 3-0 0 5.21 1.52 4.37 3.58 3.74 2.98 18.5% 5.7% 11.4 0.77 .362 16.0% 64.3% 36.5% 58.3% 10.4% 28.0% 0.51 5.15
2025 KC/SD 19 19 112.2 5-7 9 3.51 1.14 3.63 3.82 4.24 2.89 15.8% 6.9% 7.8 0.72 .271 13.4% 70.5% 40.6% 52.5% 8.2% 25.3% 0.36 4.96
2026 KC 9 9 52.0 4-2 5 4.15 1.19 4.58 4.54 4.10 2.95 16.0% 5.2% 8.8 1.38 .272 23.5% 70.1% 36.7% 47.0% 9.7% 25.4% 0.37 5.01
SP MLB Percentile 21 29 30 49-75 60 51 70 38 43 56 77 17 92 37 36 66 27 35 67 74 21 13 13 59
SP MLB AVG 13 12 67.0 4-4 4 4.41 1.31 4.35 4.31 4.22 3.26 21.6% 8.6% 8.5 1.24 .287 19.0% 72.3% 38.4% 43.0% 11.5% 27.8% 0.47 4.98
Career 70 28 211.1 12-9 14 4.05 1.24 4.03 3.94 4.09 2.93 16.5% 6.2% 8.9 0.89 .293 16.7% 68.7% 38.7% 52.5% 9.1% 26.0% 0.40 5.02

Stephen Kolek Repertoire

2024 2025 2026 All
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Stephen Kolek Game Log

Stephen Kolek Standard

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Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2024 SD 42 0 46.2 3-0 0 0 2 797 532 264 211 59 46 9 0 4 39 12 3 2
2025 KC/SD 19 19 112.2 5-7 9 0 0 1,590 1,010 580 436 96 73 12 2 9 69 30 7 0
2026 KC 9 9 52.0 4-2 5 0 0 786 504 283 213 51 32 10 1 8 34 11 2 2
SP MLB Percentile 21 29 30 49-75 60 0 0 24 25 77 28 65 67 58 27 50 18 86 45 28
SP MLB AVG 13 12 67.0 4-4 4 0 0 1,096 700 396 283 62 40 12 1 9 62 23 3 2
Career 70 28 211.1 12-9 14 0 2 3,173 2,046 1,127 860 206 151 31 3 21 142 53 12 4

Stephen Kolek Advanced

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Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2024 SD 18.5% 5.7% .303 .410 .762 .336 .362 .378 .280 .324 .332 .370 86.9 85.9 2.7 4.37
2025 KC/SD 15.8% 6.9% .244 .353 .658 .290 .271 .291 .261 .315 .290 .340 91.0 90.4 8.0 3.63
2026 KC 16.0% 5.2% .255 .435 .735 .321 .272 .307 .286 .339 .321 .380 88.5 90.5 10.2 4.58
SP MLB Percentile 17 92 37 32 46 52 66 65 9 38 11 40 55 42 79 38
SP MLB AVG 21.6% 8.6% .245 .409 .726 .320 .287 .320 .245 .325 .285 .373 88.5 89.8 14.0 4.35
Career 16.5% 6.2% .261 .388 .703 .311 .293 .316 .272 .326 .308 .360 89.4 89.5 7.3 4.03

Stephen Kolek Pitch › Mix

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Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2024 SD 18.7% (94.7) 40.5% (95.2) 13.4% (92.6) 8.4% (88.3) 12.0% (84.3) - 6.9% (88.8) - - 59.2% 40.8%
2025 KC/SD 25.8% (94.1) 24.3% (93.6) 15.3% (90.5) 16.9% (85.4) 6.9% (82.6) 0.1% (80.2) 10.7% (87.5) - - 50.1% 49.9%
2026 KC 27.7% (94.1) 22.0% (93.7) 11.6% (90.2) 16.8% (85.5) 9.4% (79.9) - 12.5% (87.0) - - 49.7% 50.3%
SP MLB Percentile 34 (42) 63 (50) 35 (65) 47 (34) 25 (19) - 36 (55) - - 64.0% 36.0%
SP MLB AVG 33.5% (94.4) 20.2% (93.8) 16.4% (89.2) 18.2% (86.1) 16.2% (82.2) 14.6% (80.2) 16.9% (86.3) 17.9% (86.5) 27.6% (80.5) 46.8% 53.1%
Career 24.5% (94.2) 27.8% (94.2) 13.9% (90.9) 14.7% (85.8) 8.8% (85.8) 0.1% (80.2) 10.2% (87.6) - - 52.3% 47.7%

Stephen Kolek Pitch › Results

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Year Team FF CSW% SI CSW% FC CSW% SL CSW% ST CSW% CB CSW% CH CSW% FS CSW% KN CSW% Fastball CSW% Secondary CSW%
2024 SD 25.5% (21) 33.7% (27) 22.4% (13) 28.4% (9) 21.9% (9) - 21.8% (4) - - 31.1% 23.4%
2025 KC/SD 26.3% (27) 26.2% (25) 29.6% (24) 23.5% (29) 25.5% (9) 0.0% (0) 18.2% (16) - - 26.2% 24.5%
2026 KC 25.2% (19) 21.4% (5) 26.4% (9) 34.8% (32) 27.0% (2) - 18.4% (9) - - 23.5% 27.3%
SP MLB Percentile 26 (28) 16 (30) 42 (35) 83 (73) 38 (4) - 19 (30) - - 8.0% 44.5%
SP MLB AVG 27.1% (36) 26.5% (11) 27.3% (16) 28.7% (25) 28.3% (18) 29.9% (18) 23.1% (23) 21.9% (30) 27.3% (11) 27.3% 28.0%
Career 25.8% (67) 28.0% (57) 27.2% (46) 27.4% (70) 24.6% (20) 0.0% (0) 18.9% (29) - - 27.0% 25.0%

Stephen Kolek Batted Ball › Contact

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Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR%
2024 SD 58.3% 23.7% 16.0% 1.9% 30.8% 33.3% 30.1% 36.5% 19.2% 63.5% 26.9% 5.8% 3.8% 36.5%
2025 KC/SD 52.5% 21.8% 20.6% 5.2% 35.9% 39.7% 36.4% 23.9% 17.4% 58.9% 27.3% 8.0% 5.8% 40.6%
2026 KC 47.0% 23.2% 20.7% 9.1% 32.9% 42.8% 36.7% 20.5% 17.6% 62.8% 23.8% 6.7% 6.7% 36.7%
SP MLB Percentile 74 42 15 43 77 54 78 17 40 65 59 38 67 67
SP MLB AVG 43.0% 22.3% 24.3% 10.4% 35.7% 42.1% 33.2% 24.7% 18.2% 61.4% 24.5% 6.3% 7.8% 38.4%
Career 52.5% 22.6% 19.5% 5.4% 33.9% 39.0% 35.0% 26.1% 17.9% 61.1% 26.3% 7.1% 5.6% 38.7%

Stephen Kolek Batted Ball › Outcomes

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Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR% IPA%
2024 SD .303 .336 .362 .378 .280 .324 .332 .370 86.9 85.9 2.7 16.0% 36.5% 27.0%
2025 KC/SD .244 .290 .271 .291 .261 .315 .290 .340 91.0 90.4 8.0 13.4% 40.6% 30.7%
2026 KC .255 .321 .272 .307 .286 .339 .321 .380 88.5 90.5 10.2 23.5% 36.7% 28.6%
SP MLB Percentile 37 52 66 65 9 38 11 40 55 42 79 27 67 25
SP MLB AVG .245 .320 .287 .320 .245 .325 .285 .373 88.5 89.8 14.0 19.0% 38.4% 26.3%
Career .261 .311 .293 .316 .272 .326 .308 .360 89.4 89.5 7.3 16.7% 38.7% 29.3%

Stephen Kolek Approach › Plate Discipline

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Year Team Zone% Str% Swing% O-Sw% Whiff% Foul Str% Con% Z-Con% O-Con% CS% SwStr% CSW% BIP% PLUS% IPR% Str-ICR
2024 SD 50.3% 66.8% 49.2% 29.5% 21.2% 19.2% 78.8% 85.5% 63.2% 17.6% 10.4% 28.0% 19.6% 59.3% 0.51 52.4%
2025 KC/SD 48.5% 63.5% 46.4% 26.9% 17.6% 17.4% 82.4% 90.5% 63.2% 17.2% 8.2% 25.3% 20.8% 57.5% 0.36 46.7%
2026 KC 46.6% 64.1% 48.3% 28.3% 20.0% 17.6% 80.0% 88.5% 61.3% 15.8% 9.7% 25.4% 21.1% 57.6% 0.37 48.6%
SP MLB Percentile 73 57 60 18 15 40 15 17 40 38 21 13 95 45 13 32
SP MLB AVG 45.0% 63.7% 47.5% 31.6% 24.3% 18.2% 75.7% 85.0% 59.7% 16.2% 11.5% 27.8% 17.7% 58.0% 0.47 50.1%
Career 48.5% 64.5% 47.6% 27.9% 19.2% 17.9% 80.8% 88.7% 62.7% 16.9% 9.1% 26.0% 20.5% 58.0% 0.40 48.6%

Stephen Kolek Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2024 SD 50.3% 28.9% 23.5% 47.7% 36.5% 28.2% 35.3% 31.0% 45.5% 7.4%
2025 KC/SD 48.5% 41.4% 25.7% 32.9% 31.8% 28.1% 40.1% 24.5% 49.9% 8.1%
2026 KC 46.6% 35.9% 24.3% 39.8% 39.7% 22.6% 37.7% 33.1% 42.6% 5.9%
SP MLB Percentile 73 50 91 67 71 48 29 84 42 21
SP MLB AVG 45.0% 35.5% 27.5% 36.9% 35.4% 22.8% 41.8% 29.1% 43.4% 6.6%
Career 48.5% 36.9% 24.8% 38.3% 34.9% 26.8% 38.3% 28.2% 47.0% 7.3%

Stephen Kolek Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2024 SD 59.6% 9.8% 30.9% 16.8% 65.4% 54.0% 23.6% 23.6% 15.9%
2025 KC/SD 61.4% 12.3% 26.5% 17.6% 62.2% 47.6% 19.8% 20.9% 16.4%
2026 KC 61.5% 13.1% 25.6% 16.8% 57.0% 46.7% 18.6% 21.4% 16.9%
SP MLB Percentile 92 27 7 76 17 18 18 5 30
SP MLB AVG 58.7% 12.0% 29.4% 15.0% 61.1% 49.7% 20.8% 26.8% 18.8%
Career 61.0% 11.8% 27.4% 17.2% 61.7% 49.0% 20.4% 21.7% 16.3%

Stephen Kolek PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2024 SD 797 5.15 49.0% 17.5% 33.5% 15.5% 7.0% 21.3 +22 2.98
2025 KC/SD 1,590 4.96 45.2% 17.4% 37.4% 7.8% 7.5% 4.3 +11 2.89
2026 KC 786 5.01 45.1% 18.0% 36.8% 8.3% 5.8% 3.6 +1 2.95
SP MLB Percentile 24 59 36 53 34 34 24 50 47 77
SP MLB AVG 1,096 4.98 46.2% 17.7% 36.1% 10.2% 4.9% 3.4 +1 3.26
Career 3,173 5.02 46.1% 17.6% 36.3% 9.8% 7.0% 29.2 +35 2.93
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