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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 3.0 9.00 2.00 20.0% 13.3%
176th 2
Sv
353rd 29.0
IP
339th 4.41
ERA
334th 1.40
WHIP
214th 22.2%
K%
286th 10.2%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.2 10.3% 24.1% 51.7% 1.7% 5.09 3.44
222nd 94.5
FB MPH
252nd 12.1%
SwStr%
325th 28.4%
CSW%
134th 50.6%
Str-ICR
10th 4.6%
MTK%
63rd 4.93
PLV
166th 3.55
PLA

Articles

6/29/2026Fantasy Baseball Relief Pitcher Roundup: 6/28Rick Graham

5/15/2026Relief Pitcher Streamer Rankings Fantasy Baseball: 5/15Rick Graham

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

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 4 0 3.0 0-0 0 0 9.00 2.00 10.33 11.77 6.31 3.44 20.0% 13.3% 12.0 6.00 .250 50.0% 93.8% 30.0% 20.0% 10.3% 24.1% 0.38 5.09
RP MLB Percentile 2 0 0 0-72 0 0 3 5 0 0 5 53 38 19 7 0 76 1 97 90 1 28 8 17 79
RP MLB AVG 23 1 29.0 2-2 2 4 4.41 1.40 4.35 4.37 4.42 3.55 22.2% 10.2% 8.5 1.13 .291 18.0% 72.0% 37.2% 43.4% 12.1% 28.4% 0.49 4.93
Career 35 0 33.2 4-2 0 2 7.49 1.84 5.07 5.92 4.45 4.22 23.5% 14.5% 10.2 1.87 .337 41.2% 61.6% 36.4% 56.6% 11.8% 28.5% 0.52 4.89

Josh Simpson Repertoire

2025 2026 All
Hide MLB Percentile | Hide MLB Average

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 4 0 3.0 0-0 0 0 0 58 36 22 15 4 1 1 0 2 3 2 0 0
RP MLB Percentile 2 0 0 0-72 0 0 0 0 0 100 0 99 99 86 34 57 0 97 69 60
RP MLB AVG 23 1 29.0 2-2 0 2 4 494 314 180 127 27 18 5 0 4 28 12 2 1
Career 35 0 33.2 4-2 0 0 2 671 419 252 166 38 24 6 1 7 39 24 3 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 20.0% 13.3% .308 .846 1.246 .510 .250 .400 .299 .504 .236 .616 97.1 102.5 33.6 10.33
RP MLB Percentile 38 19 10 0 0 1 76 7 7 0 86 0 0 0 0 0
RP MLB AVG 22.2% 10.2% .243 .393 .721 .319 .291 .321 .237 .320 .280 .361 87.8 89.3 13.4 4.35
Career 23.5% 14.5% .275 .486 .880 .384 .337 .384 .234 .348 .275 .396 90.8 93.5 7.8 5.07

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 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 5.2% (92.9) 41.4% (93.2) - - 32.8% (82.1) 20.7% (80.9) - - - 46.6% 53.4%
RP MLB Percentile 0 (21) 85 (34) - - 79 (42) 69 (50) - - - 41.4% 58.1%
RP MLB AVG 37.5% (94.5) 25.1% (94.0) 21.0% (89.4) 26.0% (85.1) 21.1% (82.6) 17.4% (79.6) 17.8% (86.2) 19.1% (86.4) 31.8% (68.1) 48.0% 51.8%
Career 11.0% (94.3) 23.8% (93.9) - 5.5% (87.9) 26.1% (87.9) 23.4% (80.6) 10.0% (89.2) - - 34.9% 65.0%

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 33.3% (1) 29.2% (1) - - 26.3% (4) 8.3% (0) - - - 29.6% 19.4%
RP MLB Percentile 85 (1) 60 (73) - - 37 (65) 4 (80) - - - 69.1% 2.6%
RP MLB AVG 26.9% (17) 27.3% (7) 27.4% (9) 29.6% (15) 28.3% (12) 27.7% (8) 21.6% (12) 24.1% (14) 23.3% (6) 27.6% 28.7%
Career 24.3% (11) 25.6% (6) - 27.0% (5) 33.7% (33) 33.8% (17) 14.9% (7) - - 25.2% 30.3%

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 20.0% 10.0% 40.0% 30.0% 30.0% 50.0% 30.0% 20.0% 20.7% 70.0% 0.0% 10.0% 20.0% 30.0%
RP MLB Percentile 1 98 96 99 75 89 26 19 86 90 100 10 0 90
RP MLB AVG 43.4% 21.6% 24.5% 10.5% 34.5% 41.1% 33.7% 25.2% 17.9% 62.5% 24.5% 5.9% 7.2% 37.2%
Career 56.6% 19.2% 17.2% 7.1% 30.3% 44.4% 37.4% 18.2% 19.2% 63.7% 21.2% 7.1% 8.1% 36.4%

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 .308 .510 .250 .400 .299 .504 .236 .616 97.1 102.5 33.6 50.0% 30.0% 20.0%
RP MLB Percentile 10 1 76 7 7 0 86 0 0 0 0 1 90 85
RP MLB AVG .243 .319 .291 .321 .237 .320 .280 .361 87.8 89.3 13.4 18.0% 37.2% 24.7%
Career .275 .384 .337 .384 .234 .348 .275 .396 90.8 93.5 7.8 41.2% 36.4% 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 50.0% 62.1% 48.3% 27.6% 21.4% 20.7% 78.6% 85.0% 62.5% 13.8% 10.3% 24.1% 17.2% 55.2% 0.38 51.7%
RP MLB Percentile 95 31 60 22 22 86 22 44 31 15 28 8 51 19 17 61
RP MLB AVG 44.4% 63.4% 47.0% 31.3% 25.6% 17.9% 74.4% 83.9% 58.6% 16.3% 12.1% 28.4% 17.1% 57.9% 0.49 50.6%
Career 48.0% 62.4% 45.8% 29.8% 25.7% 19.2% 74.3% 85.6% 51.9% 16.7% 11.8% 28.5% 14.8% 56.8% 0.52 51.7%

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 50.0% 31.0% 24.1% 44.8% 32.8% 24.1% 43.1% 24.1% 51.7% 5.2%
RP MLB Percentile 95 29 78 84 33 34 65 10 95 15
RP MLB AVG 44.4% 34.5% 27.0% 38.5% 36.5% 22.8% 40.7% 29.9% 43.1% 6.5%
Career 48.0% 32.1% 23.6% 44.3% 21.6% 26.7% 51.6% 32.5% 43.9% 7.9%

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 56.9% 13.8% 29.3% 21.2% 60.0% 53.3% 18.2% 23.5% 17.6%
RP MLB Percentile 26 27 48 99 43 73 21 25 37
RP MLB AVG 58.5% 12.4% 29.6% 14.4% 60.6% 49.8% 21.0% 26.4% 19.1%
Career 56.3% 14.0% 30.6% 14.0% 56.5% 45.9% 22.2% 27.3% 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 4.87 47.8% 14.7% 37.5% 10.3% 5.9% 13.1 +6 4.30
2026 SEA 58 5.09 41.4% 25.9% 32.8% 8.6% 1.7% 3.2 +1 3.44
RP MLB Percentile 0 79 10 100 85 85 97 32 44 53
RP MLB AVG 494 4.93 45.8% 17.2% 37.0% 8.9% 4.6% 0.9 +0 3.55
Career 671 4.89 47.2% 15.6% 37.1% 10.1% 5.5% 16.4 +7 4.22
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