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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%
97th 5
W
157th 80.0
IP
109th 4.41
ERA
73rd 1.31
WHIP
175th 21.7%
K%
20th 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
101st 94.3
FB MPH
162nd 11.6%
SwStr%
178th 27.7%
CSW%
118th 50.0%
Str-ICR
161st 4.9%
MTK%
99th 4.98
PLV
67th 3.29
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 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 4.62 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 26 21 38-69 54 45 63 39 41 44 65 12 90 30 41 56 37 21 78 72 18 11 13 46
SP MLB AVG 16 14 80.0 5-5 5 4.41 1.31 4.44 4.38 4.28 3.29 21.7% 8.5% 8.5 1.29 .286 19.6% 72.7% 38.5% 43.0% 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 26 21 38-69 54 0 0 19 18 82 20 73 74 68 12 69 12 89 57 34
SP MLB AVG 16 14 80.0 5-5 5 0 0 1,318 843 475 340 75 48 15 1 11 75 28 4 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 .374 88.2 90.0 10.2 4.62
SP MLB Percentile 12 90 29 28 39 43 56 61 10 39 12 49 59 50 82 39
SP MLB AVG 21.7% 8.5% .246 .413 .730 .320 .286 .321 .246 .325 .285 .374 88.5 90.0 13.9 4.44
Career 16.3% 6.2% .263 .392 .709 .312 .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 38 (48) 61 (50) 37 (64) 48 (36) 24 (18) - 33 (58) - - 68.5% 31.5%
SP MLB AVG 33.5% (94.3) 20.2% (93.7) 16.2% (89.2) 17.9% (86.1) 16.4% (82.2) 14.3% (80.1) 17.0% (86.3) 17.5% (86.4) 28.4% (80.6) 46.5% 53.4%
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 23 (27) 11 (25) 59 (37) 83 (68) 45 (4) - 16 (26) - - 6.0% 49.0%
SP MLB AVG 27.2% (43) 26.6% (14) 27.1% (19) 28.5% (29) 27.7% (22) 29.8% (21) 23.1% (28) 22.0% (35) 28.4% (14) 27.4% 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 47 21 44 75 57 87 9 39 74 71 33 74 78
SP MLB AVG 43.0% 22.3% 24.6% 10.2% 35.7% 42.6% 33.0% 24.5% 18.2% 61.3% 24.6% 6.3% 7.9% 38.5%
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 .374 88.2 90.0 10.2 21.1% 35.8% 28.1%
SP MLB Percentile 29 43 56 61 10 39 12 49 59 50 82 37 78 30
SP MLB AVG .246 .320 .286 .321 .246 .325 .285 .374 88.5 90.0 13.9 19.6% 38.5% 26.5%
Career .263 .312 .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 54 61 20 13 39 13 20 30 38 18 11 95 41 13 40
SP MLB AVG 44.9% 63.7% 47.6% 31.6% 24.3% 18.2% 75.7% 85.0% 59.5% 16.1% 11.6% 27.7% 17.8% 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 89 67 86 62 21 85 37 21
SP MLB AVG 44.9% 36.0% 27.5% 36.5% 35.3% 22.8% 41.8% 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 21 9 66 17 22 19 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 19 46 36 42 27 27 18 47 43 65
SP MLB AVG 1,318 4.98 46.0% 17.8% 36.2% 9.9% 4.9% 4.5 +1 3.29
Career 3,224 5.02 46.1% 17.4% 36.5% 9.5% 7.0% 30.6 +36 2.97
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