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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%
1-0 6.0 4.50 0.67 13.6% 0.0%
106th 2
W
189th 28.0
IP
117th 4.53
ERA
4th 1.37
WHIP
185th 21.8%
K%
1st 9.4%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.0 2.4% 26.5% 45.8% 13.3% 4.28 5.60
103rd 94.2
FB MPH
203rd 11.6%
SwStr%
139th 27.8%
CSW%
173rd 49.8%
Str-ICR
203rd 5.2%
MTK%
200th 4.93
PLV
191st 3.69
PLA

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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 0.23 18.5% 5.7% 11.4 0.77 .362 16.0% 64.3% 36.5% 58.3% 10.4% 28.0% 0.51 5.48
2025 KC/SD 19 19 112.2 5-7 9 3.51 1.14 3.63 3.82 4.24 2.64 15.8% 6.9% 7.8 0.72 .271 13.4% 70.5% 40.6% 52.5% 8.2% 25.3% 0.36 4.93
2026 KC 1 1 6.0 1-0 1 4.50 0.67 4.13 4.31 4.04 5.60 13.6% 0.0% 6.0 1.50 .167 20.0% 38.5% 47.4% 42.1% 2.4% 26.5% 0.42 4.28
SP MLB Percentile 0 0 6 19-85 30 40 98 54 47 59 6 8 99 86 29 96 38 0 11 42 0 31 30 1
SP MLB AVG 6 5 28.0 2-2 2 4.53 1.37 4.48 4.46 4.28 3.69 21.8% 9.4% 8.6 1.22 .289 19.4% 72.4% 38.9% 43.8% 11.6% 27.8% 0.47 4.93
Career 62 20 165.1 9-7 10 4.03 1.23 3.86 3.77 4.09 2.07 16.6% 6.3% 8.8 0.76 .295 14.4% 67.9% 39.6% 53.9% 8.7% 26.2% 0.41 4.93

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 1 1 6.0 1-0 1 0 0 83 56 27 22 4 3 0 0 1 3 0 0 1
SP MLB Percentile 0 0 6 19-85 30 0 0 5 5 96 5 94 92 96 33 73 2 99 61 22
SP MLB AVG 6 5 28.0 2-2 2 0 0 490 311 179 126 27 18 5 0 4 27 11 1 1
Career 62 20 165.1 9-7 10 0 2 2,470 1,598 871 669 159 122 21 2 14 111 42 10 3

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 13.6% 0.0% .182 .318 .500 .217 .167 .211 .323 .323 .369 .374 91.9 93.0 16.3 4.13
SP MLB Percentile 8 99 90 76 95 97 96 96 3 54 3 52 5 22 27 54
SP MLB AVG 21.8% 9.4% .244 .406 .726 .324 .289 .321 .245 .330 .286 .378 88.7 90.3 13.5 4.48
Career 16.6% 6.3% .260 .370 .686 .308 .295 .315 .270 .325 .306 .357 89.8 89.3 6.7 3.86

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% (94.0) 24.1% (93.6) 15.7% (89.2) 3.6% (85.4) 9.6% (80.3) - 19.3% (87.9) - - 51.8% 48.2%
SP MLB Percentile 36 (46) 73 (48) 51 (50) 3 (33) 25 (24) - 62 (66) - - 72.4% 27.1%
SP MLB AVG 33.1% (94.2) 20.2% (93.7) 16.7% (89.1) 18.6% (86.1) 16.1% (82.3) 14.4% (79.8) 16.9% (86.3) 21.5% (86.4) 29.4% (80.4) 46.4% 53.5%
Career 23.6% (94.2) 29.5% (94.3) 14.7% (91.0) 13.7% (85.9) 8.7% (85.9) 0.1% (80.2) 9.8% (87.8) - - 53.1% 46.9%

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 39.1% (0) 25.0% (0) 7.7% (0) 33.3% (0) 37.5% (0) - 18.8% (2) - - 32.6% 20.0%
SP MLB Percentile 98 (0) 33 (0) 1 (0) 67 (0) 91 (0) - 21 (6) - - 90.6% 2.5%
SP MLB AVG 27.0% (16) 26.5% (6) 26.5% (9) 29.7% (13) 29.0% (11) 29.1% (9) 23.4% (13) 23.6% (19) 22.8% (8) 27.5% 27.9%
Career 26.6% (48) 29.5% (52) 26.7% (37) 24.6% (38) 24.3% (18) 0.0% (0) 19.1% (22) - - 28.2% 24.0%

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 42.1% 26.3% 26.3% 5.3% 36.8% 36.8% 42.1% 21.1% 18.1% 52.7% 36.8% 5.3% 5.3% 47.4%
SP MLB Percentile 42 23 70 11 36 21 93 26 56 11 1 58 78 11
SP MLB AVG 43.8% 22.0% 24.1% 10.1% 35.4% 42.6% 32.9% 24.5% 18.1% 60.9% 24.2% 6.4% 8.5% 38.9%
Career 53.9% 22.6% 19.4% 4.2% 34.3% 37.6% 34.7% 27.7% 18.0% 60.1% 27.5% 7.2% 5.2% 39.6%

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 .182 .217 .167 .211 .323 .323 .369 .374 91.9 93.0 16.3 20.0% 47.4% 40.9%
SP MLB Percentile 90 97 96 96 3 54 3 52 5 22 27 38 11 1
SP MLB AVG .244 .324 .289 .321 .245 .330 .286 .378 88.7 90.3 13.5 19.4% 38.9% 26.4%
Career .260 .308 .295 .315 .270 .325 .306 .357 89.8 89.3 6.7 14.4% 39.6% 29.9%

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 50.6% 67.5% 43.4% 26.8% 5.6% 18.1% 94.4% 96.0% 90.9% 24.1% 2.4% 26.5% 22.9% 62.7% 0.42 45.8%
SP MLB Percentile 96 94 16 14 0 56 0 1 0 100 0 31 98 95 30 14
SP MLB AVG 44.4% 63.3% 47.2% 31.6% 24.6% 18.1% 75.4% 84.8% 59.6% 16.1% 11.6% 27.8% 17.4% 57.8% 0.47 49.8%
Career 49.1% 64.7% 47.2% 27.7% 18.5% 18.0% 81.5% 89.0% 64.1% 17.5% 8.7% 26.2% 20.4% 58.3% 0.41 48.5%

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 50.6% 44.6% 30.1% 25.3% 34.9% 31.3% 33.7% 27.7% 42.2% 7.2%
SP MLB Percentile 96 90 19 4 50 1 12 34 45 69
SP MLB AVG 44.4% 35.6% 27.6% 36.8% 35.0% 22.6% 42.4% 29.3% 43.1% 6.6%
Career 49.1% 37.5% 25.1% 37.4% 33.4% 28.3% 38.3% 26.7% 48.2% 7.8%

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 61.4% 13.3% 25.3% 15.7% 68.2% 63.6% 33.3% 28.6% 14.3%
SP MLB Percentile 88 32 12 65 93 99 100 68 18
SP MLB AVG 58.2% 12.3% 29.6% 14.8% 60.8% 49.6% 21.0% 27.0% 18.8%
Career 60.9% 11.5% 27.9% 17.3% 63.4% 50.1% 21.4% 22.1% 16.1%

Stephen Kolek PLV

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Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2024 SD 797 5.48 55.3% 16.0% 28.7% 26.6% 5.3% -0.1 -1 0.23
2025 KC/SD 1,590 4.93 44.6% 18.2% 37.3% 7.3% 7.0% -1.4 +8 2.64
2026 KC 83 4.28 24.1% 26.5% 49.4% -25.3% 13.3% -0.8 -1 5.60
SP MLB Percentile 5 1 0 98 1 1 0 72 71 6
SP MLB AVG 490 4.93 44.5% 18.8% 36.7% 7.9% 5.2% 3.7 +3 3.69
Career 2,470 4.93 44.1% 18.5% 37.4% 6.7% 7.3% -2.3 +7 2.07
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