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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%
2-0 17.0 4.24 1.00 17.4% 5.8%
82nd 2
W
170th 37.0
IP
107th 4.64
ERA
30th 1.37
WHIP
153rd 21.4%
K%
25th 9.5%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.3 7.7% 26.3% 47.9% 4.6% 5.06 2.82
99th 94.3
FB MPH
192nd 11.5%
SwStr%
141st 27.7%
CSW%
143rd 49.7%
Str-ICR
105th 4.7%
MTK%
56th 4.97
PLV
41st 3.30
PLA
The List
Rank
80th

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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 3 3 17.0 2-0 2 4.24 1.00 4.88 4.86 4.30 2.82 17.4% 5.8% 6.9 1.59 .204 23.1% 72.5% 44.2% 50.0% 7.7% 26.3% 0.44 5.06
SP MLB Percentile 10 15 17 39-89 47 48 83 32 31 47 80 25 86 74 25 94 31 50 15 79 6 29 38 72
SP MLB AVG 8 7 37.0 2-2 2 4.64 1.37 4.49 4.45 4.28 3.30 21.4% 9.5% 8.6 1.21 .287 18.9% 72.3% 38.7% 44.1% 11.5% 27.7% 0.47 4.97
Career 64 22 176.1 10-7 11 4.03 1.23 3.95 3.85 4.11 2.91 16.8% 6.4% 8.7 0.82 .291 15.2% 68.6% 39.8% 53.9% 8.8% 26.2% 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 3 3 17.0 2-0 2 0 0 259 170 89 69 13 9 1 0 3 12 4 1 1
SP MLB Percentile 10 15 17 39-89 47 0 0 13 15 87 16 85 84 90 38 63 13 90 44 29
SP MLB AVG 8 7 37.0 2-2 2 0 0 614 390 224 158 34 22 7 0 5 34 14 2 1
Career 64 22 176.1 10-7 11 0 2 2,646 1,712 933 716 168 128 22 2 16 120 46 11 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 17.4% 5.8% .203 .359 .620 .278 .204 .250 .295 .352 .346 .399 89.8 90.3 11.7 4.88
SP MLB Percentile 25 86 78 68 77 76 94 88 12 32 6 32 28 56 69 32
SP MLB AVG 21.4% 9.5% .243 .401 .723 .323 .287 .318 .245 .331 .285 .376 88.6 90.3 13.5 4.49
Career 16.8% 6.4% .257 .371 .686 .308 .291 .312 .270 .328 .308 .361 89.7 89.3 6.8 3.95

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 26.6% (94.3) 22.4% (93.8) 15.8% (89.7) 10.4% (85.2) 9.3% (79.9) - 15.4% (87.6) - - 49.0% 51.0%
SP MLB Percentile 31 (50) 65 (51) 48 (56) 25 (30) 20 (18) - 49 (65) - - 60.5% 39.0%
SP MLB AVG 33.1% (94.3) 20.4% (93.7) 16.7% (89.2) 18.7% (86.2) 16.2% (82.3) 14.6% (80.0) 16.8% (86.3) 21.4% (86.5) 27.6% (80.5) 46.7% 53.3%
Career 23.8% (94.2) 29.0% (94.3) 14.8% (91.0) 13.7% (85.9) 8.7% (85.9) 0.1% (80.2) 10.0% (87.8) - - 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 27.5% (5) 27.6% (0) 22.0% (3) 37.0% (6) 25.0% (1) - 20.0% (5) - - 27.6% 25.0%
SP MLB Percentile 55 (13) 55 (0) 22 (12) 84 (27) 28 (3) - 26 (28) - - 52.2% 24.4%
SP MLB AVG 27.0% (20) 26.7% (7) 26.5% (11) 29.7% (16) 28.0% (12) 29.3% (11) 23.3% (15) 23.0% (22) 27.3% (11) 27.4% 27.8%
Career 26.2% (53) 29.5% (52) 26.9% (40) 25.4% (44) 23.9% (19) 0.0% (0) 19.2% (25) - - 28.0% 24.2%

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 50.0% 19.2% 25.0% 5.8% 32.7% 61.5% 25.0% 13.5% 19.3% 55.7% 28.8% 7.7% 7.7% 44.2%
SP MLB Percentile 79 74 57 13 71 99 6 2 70 17 18 26 56 15
SP MLB AVG 44.1% 21.9% 23.6% 10.3% 35.2% 42.7% 32.7% 24.7% 18.1% 61.1% 24.4% 6.3% 8.2% 38.7%
Career 53.9% 22.1% 19.7% 4.3% 34.1% 40.0% 33.5% 26.6% 18.1% 60.0% 27.3% 7.3% 5.4% 39.8%

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 .203 .278 .204 .250 .295 .352 .346 .399 89.8 90.3 11.7 23.1% 44.2% 33.3%
SP MLB Percentile 78 76 94 88 12 32 6 32 28 56 69 31 15 9
SP MLB AVG .243 .323 .287 .318 .245 .331 .285 .376 88.6 90.3 13.5 18.9% 38.7% 26.3%
Career .257 .308 .291 .312 .270 .328 .308 .361 89.7 89.3 6.8 15.2% 39.8% 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 45.9% 65.6% 47.1% 30.7% 16.4% 19.3% 83.6% 89.9% 72.1% 18.5% 7.7% 26.3% 20.1% 60.6% 0.44 47.9%
SP MLB Percentile 69 80 49 43 4 70 4 13 6 86 6 29 84 81 38 30
SP MLB AVG 44.6% 63.3% 47.1% 31.4% 24.4% 18.1% 75.6% 84.9% 59.8% 16.2% 11.5% 27.7% 17.5% 57.8% 0.47 49.7%
Career 48.8% 64.7% 47.3% 28.0% 18.6% 18.1% 81.4% 88.9% 64.2% 17.4% 8.8% 26.2% 20.3% 58.4% 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 45.9% 35.5% 26.6% 37.8% 44.0% 21.6% 34.4% 30.1% 43.2% 5.0%
SP MLB Percentile 69 47 61 56 89 61 14 56 53 10
SP MLB AVG 44.6% 35.5% 27.5% 37.0% 35.2% 22.6% 42.2% 29.4% 43.1% 6.5%
Career 48.8% 37.1% 25.1% 37.8% 34.4% 27.5% 38.1% 27.0% 47.9% 7.6%

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% 12.7% 25.9% 16.4% 63.8% 55.1% 22.0% 29.9% 17.9%
SP MLB Percentile 88 40 12 70 67 84 66 79 44
SP MLB AVG 58.5% 12.3% 29.4% 14.9% 61.0% 49.7% 20.9% 26.7% 18.7%
Career 60.9% 11.6% 27.8% 17.3% 63.3% 50.2% 21.1% 22.6% 16.3%

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 259 5.06 45.9% 19.7% 34.4% 11.6% 4.6% -1.5 -3 2.82
SP MLB Percentile 13 72 44 81 70 70 46 68 75 80
SP MLB AVG 614 4.97 46.5% 17.4% 36.1% 10.3% 4.7% 1.7 +0 3.30
Career 2,646 5.03 46.4% 17.6% 36.0% 10.5% 7.1% 24.1 +30 2.91
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