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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 4.0 6.75 1.75 26.3% 10.5%
201st 2
Sv
353rd 38.0
IP
320th 4.30
ERA
313th 1.36
WHIP
92nd 22.3%
K%
222nd 9.9%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
93.1 11.3% 28.2% 56.3% 1.4% 5.17 2.87
231st 94.7
FB MPH
208th 12.1%
SwStr%
183rd 28.5%
CSW%
26th 51.0%
Str-ICR
6th 4.7%
MTK%
18th 4.94
PLV
60th 3.54
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 5 0 4.0 0-0 0 0 6.75 1.75 6.88 8.60 4.53 2.87 26.3% 10.5% 11.3 4.50 .300 50.0% 95.2% 25.0% 25.0% 11.3% 28.2% 0.52 5.17
RP MLB Percentile 1 0 0 0-78 0 0 9 10 4 1 37 83 73 36 9 0 42 1 99 98 2 40 46 60 94
RP MLB AVG 30 2 38.0 2-2 2 5 4.30 1.36 4.29 4.31 4.34 3.54 22.3% 9.9% 8.3 1.15 .288 18.2% 72.4% 36.8% 43.8% 12.1% 28.5% 0.50 4.94
Career 36 0 34.2 4-2 0 2 7.27 1.82 4.83 5.73 4.30 4.13 24.1% 14.1% 10.1 1.82 .340 41.2% 62.3% 35.6% 56.4% 11.8% 28.8% 0.54 4.90

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 5 0 4.0 0-0 0 0 0 71 46 25 19 5 2 1 0 2 5 2 0 0
RP MLB Percentile 1 0 0 0-78 0 0 0 0 0 100 0 100 100 94 41 72 0 98 77 69
RP MLB AVG 30 2 38.0 2-2 0 2 5 643 410 233 165 35 23 6 1 5 37 16 2 1
Career 36 0 34.2 4-2 0 0 2 684 429 255 170 39 25 6 1 7 41 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 26.3% 10.5% .294 .706 1.074 .449 .300 .417 .245 .410 .217 .532 94.9 102.5 28.9 6.88
RP MLB Percentile 73 36 13 1 1 1 42 3 39 4 96 0 0 0 1 4
RP MLB AVG 22.3% 9.9% .241 .393 .717 .316 .288 .319 .237 .317 .280 .360 87.7 89.2 13.2 4.29
Career 24.1% 14.1% .275 .479 .870 .379 .340 .386 .229 .340 .272 .389 90.6 93.5 7.7 4.83

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 SEA4.2% (92.9)45.1% (93.1)--33.8% (81.5)16.9% (80.9)--- 49.3% 50.7%
RP MLB Percentile 0 (20) 87 (33) - - 80 (31) 64 (50) - - - 51.6% 48.2%
RP MLB AVG 37.8% (94.7) 26.0% (93.9) 20.3% (89.4) 25.6% (85.6) 21.1% (82.5) 16.1% (79.9) 17.2% (86.2) 18.1% (86.4) 32.3% (68.3) 48.3% 51.5%
Career10.8% (94.3)24.6% (93.8)-5.4% (87.9)26.3% (82.2)23.0% (80.6)9.8% (89.2)-- 35.4% 64.5%

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 SEA33.3% (1)34.4% (2)--29.2% (5)8.3% (0)--- 34.3% 22.2%
RP MLB Percentile 88 (0) 88 (72) - - 57 (65) 4 (83) - - - 94.3% 7.4%
RP MLB AVG 27.0% (23) 27.4% (9) 26.6% (11) 29.1% (20) 27.8% (15) 27.4% (10) 21.7% (14) 23.6% (16) 22.0% (8) 27.8% 28.7%
Career24.3% (11)26.8% (7)-27.0% (5)33.9% (34)33.8% (17)14.9% (7)-- 26.0% 30.4%

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 25.0% 16.7% 33.3% 25.0% 33.3% 41.7% 25.0% 33.3% 19.7% 75.0% 0.0% 8.3% 16.7% 25.0%
RP MLB Percentile 2 83 92 99 57 53 3 94 75 98 100 17 1 98
RP MLB AVG 43.8% 21.7% 24.4% 10.2% 34.8% 41.0% 33.9% 25.1% 18.1% 62.9% 24.4% 5.7% 7.0% 36.8%
Career 56.4% 19.8% 16.8% 6.9% 30.7% 43.6% 36.6% 19.8% 19.2% 64.3% 20.8% 6.9% 7.9% 35.6%

Josh Simpson 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%
2025 MIA .272 .367 .345 .382 .227 .329 .279 .368 90.1 90.7 4.9 38.5% 37.1% 21.9%
2026 SEA .294 .449 .300 .417 .245 .410 .217 .532 94.9 102.5 28.9 50.0% 25.0% 15.8%
RP MLB Percentile 13 1 42 3 39 4 96 0 0 0 1 1 98 96
RP MLB AVG .241 .316 .288 .319 .237 .317 .280 .360 87.7 89.2 13.2 18.2% 36.8% 24.5%
Career .275 .379 .340 .386 .229 .340 .272 .389 90.6 93.5 7.7 41.2% 35.6% 21.2%

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 49.3% 64.8% 47.9% 30.6% 23.5% 19.7% 76.5% 87.0% 54.5% 16.9% 11.3% 28.2% 16.9% 57.7% 0.52 56.3%
RP MLB Percentile 92 62 54 42 37 75 37 26 71 60 40 46 47 43 60 93
RP MLB AVG 44.5% 63.7% 47.4% 31.6% 25.6% 18.1% 74.4% 83.8% 58.7% 16.3% 12.1% 28.5% 17.1% 58.2% 0.50 51.0%
Career 48.0% 62.7% 45.8% 30.1% 25.9% 19.2% 74.1% 85.9% 51.4% 17.0% 11.8% 28.8% 14.8% 57.0% 0.54 52.2%

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 49.3% 29.6% 23.9% 46.5% 29.6% 23.9% 46.5% 22.5% 53.5% 5.6%
RP MLB Percentile 92 21 82 91 18 35 78 5 97 17
RP MLB AVG 44.5% 34.7% 27.0% 38.4% 36.4% 22.9% 40.7% 29.9% 43.1% 6.6%
Career 48.0% 31.9% 23.6% 44.5% 21.5% 26.6% 51.8% 32.2% 44.2% 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 57.7% 11.3% 31.0% 19.5% 68.4% 57.9% 22.0% 22.7% 22.7%
RP MLB Percentile 34 61 66 97 93 95 62 18 79
RP MLB AVG 58.5% 12.2% 29.8% 14.5% 60.8% 50.1% 21.1% 26.6% 19.1%
Career 56.4% 13.7% 30.7% 14.0% 57.5% 46.6% 22.5% 27.1% 19.5%

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 71 5.17 45.1% 25.4% 29.6% 15.5% 1.4% 3.1 +1 2.87
RP MLB Percentile 0 94 39 100 98 98 98 36 42 83
RP MLB AVG 643 4.94 45.9% 17.4% 36.8% 9.1% 4.7% 0.7 0 3.54
Career 684 4.90 47.5% 15.8% 36.7% 10.8% 5.4% 16.2 +8 4.13
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