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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%
4-3 54.0 4.50 1.24 15.2% 5.4%
93rd 5
W
153rd 78.0
IP
112th 4.42
ERA
73rd 1.31
WHIP
174th 21.7%
K%
17th 8.5%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.2 9.6% 25.3% 49.0% 6.2% 4.98 3.12
102nd 94.3
FB MPH
159th 11.6%
SwStr%
177th 27.7%
CSW%
122nd 50.0%
Str-ICR
161st 4.9%
MTK%
103rd 4.98
PLV
69th 3.26
PLA
The List
Rank
93rd

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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 10 10 54.0 4-3 5 4.50 1.24 4.60 4.55 4.35 3.12 15.2% 5.4% 9.2 1.33 .280 21.1% 67.5% 35.8% 46.6% 9.6% 25.3% 0.36 4.98
SP MLB Percentile 17 29 23 40-69 55 44 62 40 41 42 65 12 92 30 38 56 38 22 78 72 18 10 13 46
SP MLB AVG 16 14 78.0 5-5 5 4.42 1.31 4.42 4.38 4.29 3.26 21.7% 8.5% 8.5 1.29 .287 19.5% 72.6% 38.6% 42.9% 11.6% 27.7% 0.47 4.98
Career 71 29 213.1 12-10 14 4.13 1.25 4.04 3.95 4.15 2.97 16.3% 6.2% 8.9 0.89 .295 16.2% 68.1% 38.4% 52.3% 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 10 10 54.0 4-3 5 0 0 837 536 302 224 55 34 11 2 8 34 12 2 2
SP MLB Percentile 17 29 23 40-69 55 0 0 20 20 80 22 71 73 64 12 67 13 88 55 32
SP MLB AVG 16 14 78.0 5-5 5 0 0 1,275 815 460 329 72 46 14 1 11 72 27 3 2
Career 71 29 213.1 12-10 14 0 2 3,224 2,078 1,146 871 210 153 32 4 21 142 54 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 15.2% 5.4% .262 .448 .756 .328 .280 .313 .284 .338 .316 .375 88.2 90.0 10.2 4.60
SP MLB Percentile 12 92 31 27 40 43 56 59 11 40 13 48 59 50 83 40
SP MLB AVG 21.7% 8.5% .246 .413 .730 .320 .287 .321 .246 .325 .285 .375 88.5 90.0 13.9 4.42
Career 16.3% 6.2% .263 .392 .709 .313 .295 .317 .272 .325 .307 .358 89.3 89.4 7.3 4.04

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 SD18.7% (94.7)40.5% (95.2)13.4% (92.6)8.4% (88.3)12.1% (84.3)-6.9% (88.8)-- 59.2% 40.8%
2025 KC/SD25.9% (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 KC28.4% (94.2)21.7% (93.7)12.2% (90.2)16.3% (85.6)9.3% (79.9)-12.1% (87.1)-- 50.2% 49.8%
SP MLB Percentile 37 (48) 61 (50) 38 (64) 47 (36) 24 (18) - 33 (57) - - 68.5% 32.0%
SP MLB AVG 33.4% (94.3) 20.1% (93.7) 16.3% (89.2) 18.0% (86.1) 16.4% (82.2) 14.3% (80.1) 17.1% (86.3) 17.5% (86.4) 28.4% (80.6) 46.6% 53.3%
Career24.8% (94.2)27.6% (94.2)14.0% (90.9)14.6% (85.8)8.8% (82.4)0.1% (80.2)10.1% (87.6)-- 52.4% 47.6%

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 SD25.5% (21)33.7% (27)22.4% (13)28.4% (9)21.9% (9)-21.8% (4)-- 31.1% 23.4%
2025 KC/SD26.3% (27)26.2% (25)29.6% (24)23.5% (29)25.5% (9)0.0% (0)18.2% (16)-- 26.2% 24.5%
2026 KC24.8% (21)20.3% (5)28.4% (11)34.6% (32)28.2% (2)-17.8% (9)-- 22.9% 27.8%
SP MLB Percentile 24 (28) 11 (25) 59 (39) 83 (69) 46 (4) - 16 (26) - - 6.0% 49.0%
SP MLB AVG 27.2% (41) 26.5% (13) 27.0% (18) 28.6% (28) 27.9% (21) 29.7% (20) 23.0% (27) 21.9% (34) 28.4% (14) 27.3% 27.9%
Career25.7% (69)27.7% (57)27.7% (48)27.4% (70)25.0% (20)0.0% (0)18.7% (29)-- 26.8% 25.1%

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 46.6% 22.4% 21.8% 9.2% 33.3% 43.2% 37.5% 19.3% 17.7% 63.8% 23.0% 6.9% 6.3% 35.8%
SP MLB Percentile 72 44 20 43 76 57 86 10 40 74 69 32 73 78
SP MLB AVG 42.9% 22.4% 24.6% 10.2% 35.8% 42.4% 33.1% 24.5% 18.3% 61.2% 24.7% 6.3% 7.9% 38.6%
Career 52.3% 22.4% 19.8% 5.5% 34.0% 39.1% 35.2% 25.7% 17.9% 61.3% 26.1% 7.2% 5.5% 38.4%

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 .262 .328 .280 .313 .284 .338 .316 .375 88.2 90.0 10.2 21.1% 35.8% 28.1%
SP MLB Percentile 31 43 56 59 11 40 13 48 59 50 83 38 78 29
SP MLB AVG .246 .320 .287 .321 .246 .325 .285 .375 88.5 90.0 13.9 19.5% 38.6% 26.5%
Career .263 .313 .295 .317 .272 .325 .307 .358 89.3 89.4 7.3 16.2% 38.4% 29.2%

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 46.2% 64.0% 48.3% 28.7% 19.8% 17.7% 80.2% 88.4% 62.8% 15.8% 9.6% 25.3% 21.0% 57.5% 0.36 49.0%
SP MLB Percentile 70 56 58 21 13 40 13 20 31 39 18 10 95 40 13 39
SP MLB AVG 44.9% 63.7% 47.6% 31.6% 24.3% 18.3% 75.7% 85.0% 59.7% 16.1% 11.6% 27.7% 17.7% 58.0% 0.47 50.0%
Career 48.4% 64.5% 47.5% 28.0% 19.1% 17.9% 80.9% 88.7% 63.1% 16.9% 9.1% 26.0% 20.5% 57.9% 0.40 48.7%

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 46.2% 36.7% 24.3% 39.1% 41.3% 22.0% 36.7% 33.3% 42.4% 5.9%
SP MLB Percentile 70 52 90 67 84 61 22 86 38 20
SP MLB AVG 44.9% 35.8% 27.5% 36.6% 35.4% 22.8% 41.7% 28.8% 43.7% 6.6%
Career 48.4% 37.1% 24.8% 38.2% 35.4% 26.6% 38.0% 28.4% 46.9% 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 60.9% 13.4% 25.8% 16.1% 57.3% 47.1% 18.8% 20.8% 15.7%
SP MLB Percentile 85 22 8 68 17 23 20 3 21
SP MLB AVG 58.7% 12.0% 29.4% 15.1% 61.2% 49.6% 20.8% 26.7% 18.9%
Career 60.9% 11.9% 27.4% 17.0% 61.7% 49.0% 20.4% 21.6% 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 5.15 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 837 4.98 44.9% 17.4% 37.7% 7.2% 6.2% 5.0 +3 3.12
SP MLB Percentile 20 46 34 41 28 28 17 47 42 65
SP MLB AVG 1,275 4.98 46.1% 17.8% 36.1% 10.0% 4.9% 4.2 +1 3.26
Career 3,224 5.02 46.1% 17.4% 36.5% 9.5% 7.0% 30.6 +36 2.97
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