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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%
147th 7
W
186th 123.0
IP
128th 4.24
ERA
82nd 1.29
WHIP
189th 21.7%
K%
17th 8.4%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.2 9.6% 25.3% 49.0% 5.4% 5.00 3.08
103rd 94.3
FB MPH
167th 11.6%
SwStr%
182nd 27.8%
CSW%
135th 50.3%
Str-ICR
123rd 5.0%
MTK%
77th 4.98
PLV
55th 3.28
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 10 10 54.0 4-3 5 4.50 1.24 4.61 4.55 4.30 3.08 15.2% 5.4% 9.2 1.33 .280 21.1% 67.5% 35.8% 46.6% 9.6% 25.3% 0.37 5.00
SP MLB Percentile 4 8 6 19-88 34 36 58 35 35 45 72 6 91 22 36 56 29 16 77 74 15 9 9 58
SP MLB AVG 25 22 123.0 7-7 8 4.24 1.29 4.34 4.24 4.20 3.28 21.7% 8.4% 8.4 1.22 .287 18.9% 72.9% 38.2% 43.2% 11.6% 27.8% 0.48 4.98
Career 71 29 213.1 12-10 14 4.13 1.25 4.04 3.95 4.14 2.22 16.3% 6.2% 8.9 0.89 .295 16.2% 68.1% 38.4% 52.3% 9.1% 26.0% 0.40 4.98

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 0 837 536 301 224 55 34 11 2 8 34 12 2 2
SP MLB Percentile 4 8 6 19-88 34 0 0 5 5 96 6 89 91 86 27 86 2 99 75 49
SP MLB AVG 25 22 123.0 7-7 8 0 0 2,021 1,295 726 521 114 75 22 2 16 114 42 5 3
Career 71 29 213.1 12-10 14 0 2 3,224 2,078 1,145 871 210 153 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 4.61
SP MLB Percentile 6 91 23 19 34 36 56 59 9 35 8 44 55 46 85 35
SP MLB AVG 21.7% 8.4% .245 .407 .722 .317 .287 .320 .246 .324 .285 .373 88.3 89.8 13.8 4.34
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 KC28.3% (94.2)21.7% (93.7)12.3% (90.3)16.4% (85.6)9.3% (79.9)-12.0% (87.1)-- 50.1% 49.9%
SP MLB Percentile 36 (47) 63 (52) 37 (65) 46 (35) 28 (19) - 33 (63) - - 67.5% 32.0%
SP MLB AVG 34.3% (94.3) 19.9% (93.7) 16.6% (89.3) 17.6% (86.2) 16.4% (82.2) 13.9% (80.2) 16.6% (86.1) 17.6% (86.4) 30.1% (80.5) 46.5% 53.4%
Career24.7% (94.2)27.6% (94.2)14.1% (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 KC24.9% (21)20.3% (5)28.2% (11)35.0% (33)28.2% (2)-17.0% (8)-- 22.9% 27.8%
SP MLB Percentile 21 (9) 8 (14) 61 (29) 90 (54) 45 (6) - 10 (10) - - 5.5% 50.5%
SP MLB AVG 27.2% (65) 26.9% (21) 26.9% (26) 27.9% (42) 28.0% (31) 29.9% (30) 23.0% (42) 22.0% (47) 25.5% (21) 27.3% 28.0%
Career25.7% (69)27.7% (57)27.6% (48)27.5% (71)25.0% (20)0.0% (0)18.5% (28)-- 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 74 44 17 42 78 55 92 6 36 74 74 26 77 77
SP MLB AVG 43.2% 22.0% 24.7% 10.2% 35.6% 42.7% 33.1% 24.2% 18.3% 61.6% 24.7% 6.1% 7.5% 38.2%
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 23 36 56 59 9 35 8 44 55 46 85 29 77 26
SP MLB AVG .245 .317 .287 .320 .246 .324 .285 .373 88.3 89.8 13.8 18.9% 38.2% 26.3%
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% 0.37 49.0%
SP MLB Percentile 70 54 58 18 12 36 12 17 30 35 15 9 96 35 9 31
SP MLB AVG 44.8% 63.9% 47.8% 31.9% 24.3% 18.3% 75.7% 85.2% 59.4% 16.2% 11.6% 27.8% 17.8% 58.2% 0.48 50.3%
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 92 72 85 63 21 87 39 18
SP MLB AVG 44.8% 36.1% 27.4% 36.4% 35.3% 22.7% 42.0% 28.9% 43.7% 6.5%
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 60.8% 13.4% 25.8% 16.1% 57.3% 47.1% 18.9% 20.8% 15.7%
SP MLB Percentile 93 19 5 69 12 17 17 3 18
SP MLB AVG 58.6% 11.8% 29.7% 15.1% 61.7% 50.2% 20.9% 26.8% 18.7%
Career 60.8% 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 5.48 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 837 5.00 44.7% 19.1% 36.2% 8.5% 5.4% 5.2 +3 3.08
SP MLB Percentile 5 58 34 74 49 49 34 52 43 72
SP MLB AVG 2,021 4.98 46.0% 17.9% 36.1% 9.8% 5.0% 6.0 +1 3.28
Career 3,224 4.98 45.0% 18.4% 36.5% 8.5% 6.4% 3.7 +11 2.22
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