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Josh Simpson

#37 - Relief Pitcher

Seattle Mariners

Bats / Throws Left / Left
Date of Birth 8/19/1997 (29)
Height, Weight 6'2", 190 lb
Hometown Stafford, CT

2026 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 7.1 9.82 2.05 26.3% 10.5%
221st 3
Sv
351st 52.0
IP
350th 4.19
ERA
348th 1.34
WHIP
86th 22.7%
K%
216th 9.8%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
92.9 8.5% 27.5% 50.3% 2.6% 5.02 4.05
243rd 94.7
FB MPH
322nd 12.2%
SwStr%
211th 28.6%
CSW%
215th 51.2%
Str-ICR
26th 4.7%
MTK%
104th 4.94
PLV
268th 3.56
PLA

Articles

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Josh Simpson Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L Sv Hld ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR% GB% SwStr% CSW% IPR% PLV
2025 MIA 31 0 30.2 4-2 0 2 7.34 1.83 4.56 5.39 4.29 4.36 23.8% 14.6% 10.0 1.47 .345 38.5% 59.6% 37.1% 60.7% 11.9% 28.9% 0.54 4.85
2026 SEA 8 0 7.1 0-0 0 0 9.82 2.05 6.64 9.72 5.43 4.05 26.3% 10.5% 13.5 4.91 .368 44.4% 76.9% 34.8% 26.1% 8.5% 27.5% 0.46 5.02
RP MLB Percentile 1 0 0 0-85 0 0 0 1 1 0 7 23 76 37 0 0 5 1 68 67 1 8 38 38 69
RP MLB AVG 42 2 52.0 3-3 3 7 4.19 1.34 4.16 4.17 4.24 3.56 22.7% 9.8% 8.3 1.08 .291 17.6% 72.5% 36.8% 44.0% 12.2% 28.6% 0.50 4.94
Career 39 0 38.0 4-2 0 2 7.82 1.87 4.96 6.16 4.48 4.30 24.3% 13.8% 10.7 2.13 .350 40.9% 62.5% 36.6% 53.6% 11.2% 28.6% 0.53 4.88

Josh Simpson Repertoire

2025 2026 All
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Josh Simpson Game Log

Josh Simpson 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
2025 MIA 31 0 30.2 4-2 0 0 2 613 383 229 151 34 23 5 1 5 36 22 3 3
2026 SEA 8 0 7.1 0-0 0 0 0 153 93 60 38 11 6 1 0 4 10 4 1 0
RP MLB Percentile 1 0 0 0-85 0 0 0 0 0 100 0 99 100 98 50 59 1 99 64 78
RP MLB AVG 42 2 52.0 3-3 0 3 7 884 565 319 227 48 32 9 1 6 52 21 3 2
Career 39 0 38.0 4-2 0 0 2 766 476 289 189 45 29 6 1 9 46 26 4 3

Josh Simpson Advanced

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Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2025 MIA 23.8% 14.6% .272 .448 .841 .367 .345 .382 .227 .329 .279 .368 90.1 90.7 4.9 4.56
2026 SEA 26.3% 10.5% .333 .727 1.148 .482 .368 .478 .253 .402 .263 .511 92.3 97.2 26.6 6.64
RP MLB Percentile 76 37 2 0 0 0 5 0 28 1 70 0 0 0 1 1
RP MLB AVG 22.7% 9.8% .241 .388 .712 .314 .291 .321 .235 .314 .280 .358 87.6 89.3 13.1 4.16
Career 24.3% 13.8% .285 .506 .905 .393 .350 .402 .232 .346 .276 .399 90.5 93.4 9.3 4.96

Josh Simpson 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%
2025 MIA11.6% (94.3)22.2% (94.0)-6.0% (87.9)25.5% (82.3)23.7% (80.6)10.9% (89.2)-- 33.8% 66.1%
2026 SEA4.6% (92.9)38.6% (92.9)--27.5% (80.8)25.5% (80.0)3.9% (87.1)-- 43.1% 56.9%
RP MLB Percentile 0 (19) 79 (29) - - 73 (26) 82 (39) 7 (57) - - 31.1% 68.7%
RP MLB AVG 38.7% (94.7) 26.6% (94.1) 19.7% (89.4) 25.9% (86.1) 20.7% (82.3) 15.3% (80.3) 17.8% (86.1) 18.9% (86.6) 42.7% (61.5) 48.7% 51.2%
Career10.2% (94.2)25.5% (93.7)-4.8% (87.9)25.9% (82.0)24.0% (80.4)9.5% (89.0)-- 35.6% 64.2%

Josh Simpson 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%
2025 MIA23.9% (10)25.0% (5)-27.0% (5)34.6% (29)35.9% (17)14.9% (7)-- 24.6% 31.1%
2026 SEA14.3% (1)32.2% (2)--19.0% (5)33.3% (5)16.7% (0)-- 30.3% 25.3%
RP MLB Percentile 1 (0) 83 (83) - - 9 (70) 75 (55) 21 (0) - - 75.8% 21.4%
RP MLB AVG 27.2% (32) 27.6% (13) 27.0% (15) 29.7% (28) 28.5% (20) 27.3% (15) 22.4% (21) 22.6% (21) 19.3% (9) 27.9% 28.8%
Career23.1% (11)27.2% (7)-27.0% (5)31.3% (34)35.3% (22)15.1% (7)-- 26.0% 30.1%

Josh Simpson Batted Ball › Contact

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team GB% LD% FB% PU% SS% Pull% Cent% Oppo% Foul Str% PC% Fl&B% Solid% Brl% ICR%
2025 MIA 60.7% 20.2% 14.6% 4.5% 30.3% 43.8% 38.2% 18.0% 19.1% 62.9% 23.6% 6.7% 6.7% 37.1%
2026 SEA 26.1% 17.4% 39.1% 17.4% 39.1% 47.8% 34.8% 17.4% 18.3% 65.2% 13.0% 4.3% 17.4% 34.8%
RP MLB Percentile 1 85 99 94 19 89 60 4 53 69 100 74 0 67
RP MLB AVG 44.0% 21.7% 24.1% 10.2% 34.6% 40.9% 33.7% 25.4% 18.1% 63.0% 24.5% 5.8% 6.8% 36.8%
Career 53.6% 19.6% 19.6% 7.1% 32.1% 44.6% 37.5% 17.9% 18.9% 63.5% 21.4% 6.3% 8.9% 36.6%

Josh Simpson Batted Ball › Outcomes

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team AVG wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA HR/FB ICR% IPA%
2025 MIA .272 .367 .345 .382 .227 .329 .279 .368 90.1 90.7 4.9 38.5% 37.1% 21.9%
2026 SEA .333 .482 .368 .478 .253 .402 .263 .511 92.3 97.2 26.6 44.4% 34.8% 21.1%
RP MLB Percentile 2 0 5 0 28 1 70 0 0 0 1 1 67 80
RP MLB AVG .241 .314 .291 .321 .235 .314 .280 .358 87.6 89.3 13.1 17.6% 36.8% 24.4%
Career .285 .393 .350 .402 .232 .346 .276 .399 90.5 93.4 9.3 40.9% 36.6% 21.7%

Josh Simpson 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
2025 MIA 47.8% 62.5% 45.5% 30.0% 26.2% 19.1% 73.8% 85.7% 51.0% 17.0% 11.9% 28.9% 14.5% 56.9% 0.54 51.7%
2026 SEA 46.4% 60.8% 41.8% 24.4% 20.3% 18.3% 79.7% 86.4% 65.0% 19.0% 8.5% 27.5% 15.0% 53.6% 0.46 50.3%
RP MLB Percentile 74 13 5 3 16 53 16 31 21 89 8 38 18 3 38 38
RP MLB AVG 44.5% 63.8% 47.4% 31.7% 25.6% 18.1% 74.4% 83.9% 58.5% 16.4% 12.2% 28.6% 17.1% 58.3% 0.50 51.2%
Career 47.5% 62.1% 44.8% 28.9% 25.1% 18.9% 74.9% 85.8% 53.4% 17.4% 11.2% 28.6% 14.6% 56.3% 0.53 51.4%

Josh Simpson Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2025 MIA 47.8% 32.2% 23.5% 44.3% 20.6% 27.0% 52.5% 33.3% 43.1% 8.2%
2026 SEA 46.4% 33.3% 22.9% 43.8% 26.1% 28.1% 45.8% 24.8% 52.3% 5.2%
RP MLB Percentile 74 42 90 82 7 5 75 11 97 6
RP MLB AVG 44.5% 34.6% 27.0% 38.4% 36.2% 22.9% 40.9% 29.9% 43.1% 6.6%
Career 47.5% 32.4% 23.4% 44.2% 21.7% 27.2% 51.1% 31.6% 45.0% 7.6%

Josh Simpson Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2025 MIA 56.1% 14.0% 30.7% 13.4% 56.1% 45.2% 22.7% 27.7% 19.1%
2026 SEA 54.2% 10.5% 35.3% 12.0% 66.7% 61.1% 27.7% 20.4% 18.5%
RP MLB Percentile 1 75 97 15 88 99 99 6 40
RP MLB AVG 58.5% 12.1% 29.9% 14.5% 61.1% 50.2% 21.1% 26.7% 19.3%
Career 55.7% 13.3% 31.6% 13.1% 58.1% 48.2% 23.7% 26.0% 19.0%

Josh Simpson PLV

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Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2025 MIA 613 4.85 46.6% 15.0% 38.4% 8.2% 5.7% 12.9 +7 4.36
2026 SEA 153 5.02 47.1% 19.6% 33.3% 13.7% 2.6% 7.1 +3 4.05
RP MLB Percentile 0 69 64 82 83 83 91 19 32 23
RP MLB AVG 884 4.94 45.9% 17.3% 36.8% 9.1% 4.7% 0.6 0 3.56
Career 766 4.88 46.7% 15.9% 37.4% 9.3% 5.1% 19.9 +9 4.30
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