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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

2025 Season Stats

MLB Rank MLB Average
W-L IP ERA WHIP K% BB%
5-7 112.2 3.51 1.14 15.8% 6.9%
118th 7
W
112th 121.0
IP
58th 4.24
ERA
45th 1.28
WHIP
173rd 21.9%
K%
63rd 7.9%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
94.1 8.2% 25.3% 46.7% 7.7% 4.97 2.90
94th 94.1
FB MPH
197th 11.7%
SwStr%
195th 28.1%
CSW%
180th 50.0%
Str-ICR
175th 5.9%
MTK%
119th 5.01
PLV
59th 3.16
PLA

Articles

2/24/2026Top 400 Starting Pitchers For Fantasy Baseball 2026 - SP Rankings 41-60Nick Pollack

2/23/2026Kansas City Royals Rotation and SP Prospects Analyzed For 2026Nick Pollack

2/21/2026Daily Starting Pitcher News And Spring SP Roundup - 2-20-26Nick Pollack

12/17/2025Out%: 2025 In ReviewTaylor Tarter

10/22/2025Top 200 Starting Pitchers For Fantasy Baseball 2026Nick Pollack

See More Articles
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Stephen Kolek Overview

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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 3.65 3.82 4.24 2.90 15.8% 6.9% 7.8 0.72 .271 13.4% 70.5% 40.6% 52.5% 8.2% 25.3% 0.36 4.97
SP MLB Percentile 29 40 43 31-45 57 71 77 53 69 51 71 13 69 66 90 72 86 33 33 90 2 2 6 37
SP MLB AVG 24 22 121.0 7-7 8 4.24 1.28 4.32 4.25 4.18 3.16 21.9% 7.9% 8.5 1.26 .288 19.5% 73.1% 39.5% 43.5% 11.7% 28.1% 0.48 5.01
Career 61 19 159.1 8-7 9 4.01 1.26 3.86 3.75 4.09 2.93 16.7% 6.5% 8.9 0.73 .300 14.1% 68.3% 39.3% 54.4% 8.9% 26.2% 0.41 5.03

Stephen Kolek Repertoire

2024 2025 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
SP MLB Percentile 29 40 43 31-45 57 0 0 35 34 64 39 62 52 79 27 82 22 69 16 88
SP MLB AVG 24 22 121.0 7-7 8 0 0 1,974 1,267 708 509 113 73 22 2 16 111 39 5 3
Career 61 19 159.1 8-7 9 0 2 2,387 1,542 844 647 155 119 21 2 13 108 42 10 2

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 3.65
SP MLB Percentile 13 69 54 81 77 76 72 84 30 53 41 84 8 55 89 53
SP MLB AVG 21.9% 7.9% .246 .410 .722 .314 .288 .322 .247 .322 .286 .375 89.1 90.5 13.4 4.32
Career 16.7% 6.5% .263 .372 .692 .305 .300 .319 .268 .318 .304 .350 89.7 89.1 6.3 3.86

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) 17.0% (85.3) 6.8% (82.6) 0.1% (80.2) 10.7% (87.5) - - 50.1% 49.9%
SP MLB Percentile 20 (51) 72 (54) 50 (70) 47 (42) 14 (56) 0 (53) 33 (68) - - 62.5% 36.0%
SP MLB AVG 37.2% (94.1) 20.3% (93.3) 16.5% (89.1) 18.5% (85.7) 16.5% (82.1) 15.1% (79.7) 15.8% (85.9) 16.3% (85.9) 74.0% (79.4) 47.0% 53.0%
Career 23.5% (94.2) 29.7% (94.3) 14.7% (91.1) 14.1% (85.9) 8.5% (85.9) 0.1% (80.2) 9.4% (87.8) - - 53.2% 46.8%

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) 23.3% (29) 25.9% (9) 0.0% (0) 18.2% (16) - - 26.2% 24.5%
SP MLB Percentile 37 (17) 35 (76) 73 (64) 15 (48) 30 (22) 0 (0) 20 (31) - - 29.5% 12.5%
SP MLB AVG 27.5% (67) 27.5% (20) 26.4% (25) 28.6% (44) 29.3% (31) 30.3% (33) 23.2% (40) 23.0% (39) 20.8% (6) 27.7% 28.2%
Career 26.1% (48) 29.6% (52) 27.4% (37) 24.3% (38) 24.0% (18) 0.0% (0) 19.1% (20) - - 28.1% 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%
SP MLB Percentile 90 58 14 7 50 24 84 40 36 31 18 14 91 33
SP MLB AVG 43.5% 22.1% 24.6% 9.9% 35.8% 42.1% 33.1% 24.7% 18.2% 60.4% 24.8% 6.4% 8.5% 39.5%
Career 54.4% 22.4% 19.1% 4.1% 34.2% 37.7% 34.4% 28.0% 18.0% 60.3% 27.2% 7.3% 5.2% 39.3%

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%
SP MLB Percentile 54 76 72 84 30 53 41 84 8 55 89 86 33 14
SP MLB AVG .246 .314 .288 .322 .247 .322 .286 .375 89.1 90.5 13.4 19.5% 39.5% 27.4%
Career .263 .305 .300 .319 .268 .318 .304 .350 89.7 89.1 6.3 14.1% 39.3% 29.5%

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 48.6% 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%
SP MLB Percentile 66 41 29 13 3 36 3 2 20 72 2 2 95 34 6 10
SP MLB AVG 47.3% 64.1% 47.7% 30.0% 24.5% 18.2% 75.5% 84.4% 57.8% 16.4% 11.7% 28.1% 17.9% 58.3% 0.48 50.0%
Career 49.1% 64.6% 47.3% 27.8% 18.9% 18.0% 81.1% 88.8% 63.2% 17.3% 8.9% 26.2% 20.4% 58.1% 0.41 48.6%

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 48.6% 41.4% 25.7% 32.9% 31.7% 28.2% 40.1% 24.5% 49.9% 8.1%
SP MLB Percentile 66 82 67 19 60 7 24 15 88 86
SP MLB AVG 47.3% 35.4% 26.7% 37.9% 30.0% 24.9% 45.2% 28.4% 44.9% 6.9%
Career 49.1% 37.2% 24.9% 37.8% 33.3% 28.2% 38.5% 26.6% 48.4% 7.9%

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%
SP MLB Percentile 94 34 5 89 49 18 24 12 23
SP MLB AVG 58.7% 11.6% 29.9% 15.2% 62.3% 50.6% 21.4% 24.3% 18.8%
Career 60.8% 11.4% 28.0% 17.4% 63.3% 49.7% 21.0% 21.9% 16.2%

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 4.97 44.5% 17.9% 37.6% 6.9% 7.7% 4.2 +10 2.90
SP MLB Percentile 35 37 32 38 21 21 12 72 48 71
SP MLB AVG 1,974 5.01 45.9% 18.7% 35.3% 10.6% 5.9% 13.5 +10 3.16
Career 2,387 5.03 46.0% 17.8% 36.3% 9.7% 7.5% 25.5 +33 2.93
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