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Josh Simpson

#37 - Relief Pitcher

Seattle Mariners

Bats / Throws Left / Left
Date of Birth 8/19/1997 (28)
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 2.1 7.71 1.29 30.0% 10.0%
- 1
Sv
- 15.0
IP
- 4.74
ERA
- 1.46
WHIP
- 22.0%
K%
- 10.7%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.3 12.5% 27.5% 55.0% 7.5% 4.54 5.79
- 94.2
FB MPH
- 11.9%
SwStr%
- 28.4%
CSW%
- 50.2%
Str-ICR
- 6.0%
MTK%
- 4.72
PLV
- 4.73
PLA

Articles

5/14/2026Fantasy Baseball Relief Pitcher Roundup: 5/13Rick Graham

5/14/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 5/14Rick Graham

5/13/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 5/13Rick Graham

5/12/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 5/12Rick Graham

5/11/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 5/11Rick Graham

See More 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 4.30 23.8% 14.6% 10.0 1.47 .345 38.5% 59.6% 37.1% 60.7% 11.9% 28.9% 0.54 4.87
2026 SEA 3 0 2.1 0-0 0 0 7.71 1.29 9.42 14.06 5.96 5.79 30.0% 10.0% 7.7 7.71 .000 50.0% 100.0% 33.3% 16.7% 12.5% 27.5% 0.55 4.54
RP MLB Percentile - - - --- - - - - - - - - - - - - - - - - - - - - -
RP MLB AVG 12 1 15.0 1-1 1 2 4.74 1.46 4.43 4.43 4.40 4.73 22.0% 10.7% 8.8 1.11 .296 17.5% 71.6% 37.5% 44.3% 11.9% 28.4% 0.49 4.72
Career 34 0 33.0 4-2 0 2 7.36 1.79 4.90 5.89 4.37 4.40 24.2% 14.3% 9.8 1.91 .330 41.2% 61.3% 36.8% 57.9% 11.9% 28.8% 0.54 4.85

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 2 613 383 230 151 34 23 5 1 5 36 22 3 3
2026 SEA 3 0 2.1 0-0 0 0 0 40 26 14 10 2 0 0 0 2 3 1 0 0
RP MLB Percentile - - - --- - - - - - - - - - - - - - - - -
RP MLB AVG 12 1 15.0 1-1 0 1 2 266 168 98 68 14 10 3 0 2 15 7 1 1
Career 34 0 33.0 4-2 0 0 2 653 409 244 161 36 23 5 1 7 39 23 3 3

Josh Simpson Advanced

Hide 2026 MLB Percentile | Hide 2026 MLB Average
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 30.0% 10.0% .222 .889 1.189 .489 .000 .333 .222 .489 .000 .697 98.1 102.5 31.7 9.42
RP MLB Percentile - - - - - - - - - - - - - - - -
RP MLB AVG 22.0% 10.7% .245 .394 .728 .325 .296 .325 .238 .326 .283 .368 88.1 89.3 13.1 4.43
Career 24.2% 14.3% .269 .478 .866 .382 .330 .379 .227 .346 .266 .397 90.6 93.5 6.6 4.90

Josh Simpson Pitch › Mix

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team FF% (MPH) SI% (MPH) FC% (MPH) SL% (MPH) ST% (MPH) CB% (MPH) CH% (MPH) FS% (MPH) KN% (MPH) Fastball% Secondary%
2025 MIA 11.6% (94.3) 22.2% (94.0) - 6.0% (87.9) 25.4% (82.3) 23.7% (80.6) 10.9% (89.2) - - 33.8% 66.1%
2026 SEA 2.5% (93.1) 50.0% (93.3) - - 37.5% (82.4) 10.0% (81.5) - - - 52.5% 47.5%
RP MLB Percentile - - - - - - - - - - -
RP MLB AVG 35.9% (94.2) 26.7% (93.9) 20.7% (89.3) 26.7% (85.5) 23.3% (82.5) 17.2% (80.7) 18.4% (86.0) 19.5% (86.2) 31.7% (68.1) 47.5% 52.3%
Career 11.0% (94.3) 23.9% (93.9) - 5.7% (87.9) 26.2% (87.9) 22.8% (80.6) 10.3% (89.2) - - 34.9% 64.9%

Josh Simpson Pitch › Results

Hide 2026 MLB Percentile | Hide 2026 MLB Average
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 MIA 23.9% (10) 25.0% (5) - 27.0% (5) 34.6% (29) 35.9% (17) 14.9% (7) - - 24.6% 31.1%
2026 SEA 0.0% (0) 30.0% (1) - - 33.3% (4) 0.0% (0) - - - 28.6% 26.3%
RP MLB Percentile - - - - - - - - - - -
RP MLB AVG 26.8% (9) 28.0% (5) 27.5% (6) 29.7% (9) 27.6% (8) 26.8% (5) 21.9% (7) 25.9% (9) 23.4% (6) 27.8% 28.3%
Career 23.6% (10) 25.6% (6) - 27.0% (5) 34.5% (33) 34.9% (17) 14.9% (7) - - 25.0% 30.9%

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 16.7% 0.0% 66.7% 16.7% 33.3% 50.0% 33.3% 16.7% 22.5% 66.7% 0.0% 0.0% 33.3% 33.3%
RP MLB Percentile - - - - - - - - - - - - - -
RP MLB AVG 44.3% 21.3% 24.4% 10.1% 34.1% 41.7% 33.5% 24.8% 17.5% 62.3% 24.2% 6.0% 7.5% 37.5%
Career 57.9% 18.9% 17.9% 5.3% 30.5% 44.2% 37.9% 17.9% 19.3% 63.1% 22.1% 6.3% 8.4% 36.8%

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 .222 .489 .000 .333 .222 .489 .000 .697 98.1 102.5 31.7 50.0% 33.3% 20.0%
RP MLB Percentile - - - - - - - - - - - - - -
RP MLB AVG .245 .325 .296 .325 .238 .326 .283 .368 88.1 89.3 13.1 17.5% 37.5% 24.6%
Career .269 .382 .330 .379 .227 .346 .266 .397 90.6 93.5 6.6 41.2% 36.8% 21.7%

Josh Simpson Approach › Plate Discipline

Hide 2026 MLB Percentile | Hide 2026 MLB Average
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 57.5% 65.0% 50.0% 23.5% 25.0% 22.5% 75.0% 81.3% 50.0% 15.0% 12.5% 27.5% 15.0% 60.0% 0.55 55.0%
RP MLB Percentile - - - - - - - - - - - - - - - -
RP MLB AVG 44.2% 62.9% 46.4% 30.7% 25.5% 17.5% 74.5% 83.8% 59.0% 16.6% 11.9% 28.4% 17.0% 57.5% 0.49 50.2%
Career 48.4% 62.6% 45.8% 29.7% 26.1% 19.3% 73.9% 85.4% 51.0% 16.8% 11.9% 28.8% 14.5% 57.1% 0.54 51.9%

Josh Simpson Approach › Locations

Hide 2026 MLB Percentile | Hide 2026 MLB Average
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 57.5% 37.5% 17.5% 45.0% 32.5% 22.5% 45.0% 25.0% 57.5% 5.0%
RP MLB Percentile - - - - - - - - - -
RP MLB AVG 44.2% 35.1% 26.7% 38.2% 36.2% 22.8% 41.0% 30.5% 42.8% 6.5%
Career 48.4% 32.5% 23.2% 44.3% 21.3% 26.7% 52.0% 32.8% 44.0% 8.0%

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 56.3% 14.0% 30.7% 13.3% 56.1% 45.2% 22.6% 27.7% 19.1%
2026 SEA 52.5% 10.0% 37.5% 23.8% 70.0% 60.0% 23.8% 20.0% 20.0%
RP MLB Percentile - - - - - - - - -
RP MLB AVG 58.5% 12.8% 29.2% 14.2% 59.8% 49.4% 21.0% 25.9% 19.3%
Career 56.0% 13.8% 31.1% 13.9% 57.0% 46.1% 22.7% 27.1% 19.2%

Josh Simpson PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2025 MIA 613 4.87 47.8% 14.7% 37.5% 10.3% 5.9% 13.1 +6 4.30
2026 SEA 40 4.54 27.5% 32.5% 40.0% -12.5% 7.5% 2.0 -1 5.79
RP MLB Percentile - - - - - - - - - -
RP MLB AVG 266 4.72 39.7% 19.8% 40.5% -0.8% 6.0% 1.9 +2 4.73
Career 653 4.85 46.6% 15.8% 37.7% 8.9% 6.0% 15.1 +6 4.40
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