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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%
3-1 43.0 3.14 1.07 17.4% 5.2%
72nd 3
W
145th 52.0
IP
57th 4.42
ERA
17th 1.32
WHIP
141st 21.5%
K%
18th 9.0%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.1 9.8% 26.4% 49.8% 6.1% 5.05 2.80
112th 94.4
FB MPH
162nd 11.5%
SwStr%
141st 27.7%
CSW%
79th 49.7%
Str-ICR
141st 4.8%
MTK%
45th 4.98
PLV
27th 3.34
PLA
The List
Rank
79th

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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 7 7 43.0 3-1 4 3.14 1.07 4.10 3.92 3.97 2.80 17.4% 5.2% 7.7 1.05 .252 17.2% 72.5% 34.8% 48.1% 9.8% 26.4% 0.40 5.05
SP MLB Percentile 17 22 27 43-78 57 71 91 66 54 63 86 29 91 80 48 96 46 40 86 82 18 28 23 77
SP MLB AVG 10 9 52.0 3-3 3 4.42 1.32 4.40 4.38 4.26 3.34 21.5% 9.0% 8.4 1.23 .287 18.9% 72.5% 38.8% 43.1% 11.5% 27.7% 0.47 4.98
Career 68 26 202.1 11-8 13 3.83 1.22 3.90 3.78 4.06 2.89 16.8% 6.2% 8.6 0.80 .290 14.9% 69.0% 38.3% 53.0% 9.1% 26.3% 0.41 5.03

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 7 7 43.0 3-1 4 0 0 640 411 229 172 37 25 7 0 5 30 9 1 2
SP MLB Percentile 17 22 27 43-78 57 0 0 22 22 79 24 78 76 71 50 60 20 87 58 18
SP MLB AVG 10 9 52.0 3-3 3 0 0 872 555 317 225 49 32 10 1 7 49 19 2 1
Career 68 26 202.1 11-8 13 0 2 3,027 1,953 1,073 819 192 144 28 2 18 138 51 11 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 17.4% 5.2% .228 .364 .637 .283 .252 .280 .270 .322 .310 .367 88.5 90.6 11.3 4.10
SP MLB Percentile 29 91 82 71 82 84 96 92 37 66 38 66 57 38 80 66
SP MLB AVG 21.5% 9.0% .246 .410 .730 .323 .287 .321 .246 .329 .285 .377 88.6 90.1 13.9 4.40
Career 16.8% 6.2% .256 .370 .681 .304 .290 .311 .268 .323 .305 .357 89.4 89.5 7.4 3.90

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 29.1% (94.1) 22.5% (93.6) 11.4% (90.1) 15.2% (85.4) 8.9% (79.7) - 13.0% (87.0) - - 51.6% 48.4%
SP MLB Percentile 39 (41) 65 (48) 32 (63) 42 (33) 21 (14) - 40 (57) - - 78.0% 21.5%
SP MLB AVG 33.7% (94.4) 20.0% (93.7) 16.5% (89.2) 18.1% (86.1) 16.4% (82.5) 14.4% (80.1) 16.7% (86.3) 18.1% (86.6) 27.6% (80.5) 46.9% 53.1%
Career 24.6% (94.2) 28.2% (94.2) 14.0% (90.9) 14.3% (85.8) 8.7% (85.8) 0.1% (80.2) 10.2% (87.6) - - 52.8% 47.2%

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 26.9% (17) 24.3% (4) 27.4% (8) 36.1% (25) 26.3% (2) - 16.9% (7) - - 25.8% 27.1%
SP MLB Percentile 48 (36) 30 (29) 55 (36) 85 (72) 34 (3) - 12 (28) - - 41.0% 30.5%
SP MLB AVG 27.1% (28) 26.6% (9) 26.7% (13) 29.4% (20) 28.4% (16) 29.6% (15) 23.4% (19) 21.8% (25) 27.3% (11) 27.3% 27.9%
Career 26.3% (65) 28.7% (56) 27.4% (45) 27.1% (63) 24.3% (20) 0.0% (0) 18.5% (27) - - 27.6% 24.8%

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 48.1% 20.6% 22.1% 9.2% 31.3% 44.7% 34.8% 20.5% 17.2% 65.0% 22.9% 6.1% 6.1% 34.8%
SP MLB Percentile 82 72 38 26 81 85 54 9 41 85 86 34 70 86
SP MLB AVG 43.1% 22.2% 24.4% 10.3% 35.7% 42.5% 33.0% 24.5% 18.1% 61.0% 24.5% 6.4% 8.2% 38.8%
Career 53.0% 22.0% 19.7% 5.2% 33.6% 39.2% 34.5% 26.4% 17.8% 61.4% 26.3% 7.0% 5.4% 38.3%

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 .228 .283 .252 .280 .270 .322 .310 .367 88.5 90.6 11.3 17.2% 34.8% 26.7%
SP MLB Percentile 82 84 96 92 37 66 38 66 57 38 80 46 86 59
SP MLB AVG .246 .323 .287 .321 .246 .329 .285 .377 88.6 90.1 13.9 18.9% 38.8% 26.6%
Career .256 .304 .290 .311 .268 .323 .305 .357 89.4 89.5 7.4 14.9% 38.3% 28.9%

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 46.9% 64.2% 47.7% 28.5% 20.7% 17.2% 79.3% 87.5% 61.9% 16.6% 9.8% 26.4% 20.6% 58.4% 0.40 49.8%
SP MLB Percentile 65 61 48 28 16 41 16 20 24 64 18 28 88 69 23 59
SP MLB AVG 44.9% 63.4% 47.2% 31.4% 24.3% 18.1% 75.7% 85.0% 59.8% 16.2% 11.5% 27.7% 17.7% 57.8% 0.47 49.7%
Career 48.6% 64.5% 47.4% 27.9% 19.2% 17.8% 80.8% 88.5% 62.9% 17.1% 9.1% 26.3% 20.4% 58.2% 0.41 48.9%

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 46.9% 36.4% 23.6% 40.0% 39.1% 22.8% 38.1% 34.1% 42.3% 5.3%
SP MLB Percentile 65 52 90 63 71 56 32 82 42 3
SP MLB AVG 44.9% 35.7% 27.5% 36.8% 35.7% 22.6% 41.8% 29.2% 43.2% 6.6%
Career 48.6% 37.1% 24.6% 38.3% 34.6% 27.0% 38.4% 28.2% 47.1% 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 61.1% 13.1% 25.8% 16.4% 59.0% 48.6% 19.9% 22.4% 18.2%
SP MLB Percentile 84 28 10 71 28 41 42 27 47
SP MLB AVG 58.7% 12.2% 29.3% 15.0% 60.9% 49.4% 20.8% 26.7% 18.8%
Career 60.9% 11.8% 27.5% 17.1% 62.4% 49.5% 20.8% 22.0% 16.6%

Stephen Kolek PLV

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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 640 5.05 45.3% 18.0% 36.7% 8.6% 6.1% -3.1 -4 2.80
SP MLB Percentile 22 77 42 75 60 60 28 79 80 86
SP MLB AVG 872 4.98 46.4% 17.4% 36.2% 10.2% 4.8% 2.8 +1 3.34
Career 3,027 5.03 46.2% 17.5% 36.3% 10.0% 7.1% 22.5 +29 2.89
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