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Casey Kelly

#0 - Relief Pitcher

Arizona Diamondbacks

Bats / Throws Right / Right
Date of Birth 10/4/1989 (36)
Height, Weight 6'3", 215 lb
Hometown Sarasota, FL

2025 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
Sv IP ERA WHIP K% BB%
0 1.2 0.00 1.20 0.0% 16.7%
277th 3
Sv
356th 51.0
IP
6th 4.19
ERA
129th 1.32
WHIP
356th 22.9%
K%
349th 9.3%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
91.5 8.3% 20.8% 45.8% 4.2% 4.55 3.98
702nd 94.6
FB MPH
341st 12.5%
SwStr%
355th 28.7%
CSW%
332nd 50.8%
Str-ICR
69th 5.9%
MTK%
355th 5.00
PLV
349th 2.31
PLA

Articles

1/6/2026Arizona Diamondbacks Rotation and SP Prospects Analyzed For 2026Nick Pollack

8/19/2025Expected SP Schedules Weeks 21-22: Skenes From Around the LeagueRyan Clark

8/16/2025Starting Pitcher Streamer Rankings Fantasy Baseball: 8/16 & 8/17 & 8/18Nick Pollack

8/15/2025Starting Pitcher Streamer Rankings Fantasy Baseball: 8/15 & 8/16 & 8/17Nick Pollack

8/30/2024MLB News & Moments You Should Know: 8/30/2024Steve Drumwright

See More Articles
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Casey Kelly Overview

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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
2012 SD 6 6 29.0 2-3 0 - 6.21 1.69 - 4.78 - - 19.1% 7.4% 12.1 1.55 .378 - 63.6% - - - - - -
2015 SD 3 2 11.1 0-2 0 - 7.94 1.94 - 4.13 - - 12.5% 5.4% 15.1 0.79 .409 - 46.3% - - - - - -
2016 ATL 10 1 21.2 0-3 0 - 5.82 1.71 - 4.37 - - 6.9% 6.9% 12.5 0.42 .341 - 66.5% - - - - - -
2018 SF 7 3 23.2 0-3 0 0 3.04 1.39 - 4.24 - - 15.4% 4.8% 10.6 1.14 .316 - 80.5% - - 11.9% 26.6% 0.41 -
2024 CIN 2 0 5.1 0-0 1 0 5.06 1.13 3.75 4.74 4.52 - 19.0% 4.8% 8.4 1.69 .267 20.0% 65.2% 25.0% 37.5% 15.4% 26.9% 0.46 -
2025 ARI 2 0 1.2 0-0 0 0 0.00 1.20 3.36 5.64 5.64 3.98 0.0% 16.7% 5.4 0.00 .200 - 100.0% 20.0% 40.0% 8.3% 20.8% 0.08 4.55
RP MLB Percentile 2 34 1 9-92 24 9 99 65 78 11 5 4 2 4 95 98 96 - 99 99 36 6 2 2 2
RP MLB AVG 42 2 51.0 3-3 3 7 4.19 1.32 4.19 4.16 4.20 2.31 22.9% 9.3% 8.3 1.11 .291 18.1% 72.4% 38.1% 44.2% 12.5% 28.7% 0.51 5.00
Career 30 12 92.2 2-11 1 0 5.34 1.61 3.66 4.45 4.57 0.95 14.1% 6.4% 11.8 1.07 .349 80.0% 65.9% 4.9% 38.1% 12.3% 26.3% 0.40 4.55

Casey Kelly Repertoire

2018 2024 2025 All
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Casey Kelly Game Log

Casey Kelly 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
2012 SD 6 6 29.0 2-3 2 0 - 505 320 185 136 39 26 8 0 5 26 10 2 0
2015 SD 3 2 11.1 0-2 0 0 - 201 127 74 56 19 14 4 0 1 7 3 1 0
2016 ATL 10 1 21.2 0-3 0 0 - 376 233 143 102 30 19 8 2 1 7 7 2 1
2018 SF 7 3 23.2 0-3 1 0 0 354 237 117 104 28 18 5 2 3 16 5 1 0
2024 CIN 2 0 5.1 0-0 0 1 0 78 52 26 21 5 3 1 0 1 4 1 0 0
2025 ARI 2 0 1.2 0-0 0 0 0 24 13 11 6 1 1 0 0 0 0 1 0 1
RP MLB Percentile 2 34 1 9-92 47 24 9 2 2 99 2 99 99 99 73 98 2 98 90 65
RP MLB AVG 42 2 51.0 3-3 0 3 7 840 539 301 216 46 30 9 1 6 50 19 2 2
Career 30 12 92.2 2-11 3 1 0 1,538 982 556 425 122 81 26 4 11 60 27 6 2

Casey Kelly Advanced

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Year Team K% BB% AVG SLG OPS wOBA BABIP BACON xAVG xwOBA xBABIP xwoBACON EV FB EV LA xERA
2012 SD 19.1% 7.4% .322 .512 .895 .386 .378 .411 - - - - - - - -
2015 SD 12.5% 5.4% .365 .500 .911 .396 .409 .422 - - - - - - - -
2016 ATL 6.9% 6.9% .326 .489 .871 .363 .341 .349 - - - - - - - -
2018 SF 15.4% 4.8% .292 .479 .806 .338 .316 .341 - - - - - - - -
2024 CIN 19.0% 4.8% .263 .474 .760 .316 .267 .313 .248 .300 .248 .350 88.4 90.6 21.9 3.75
2025 ARI 0.0% 16.7% .200 .200 .533 .262 .200 .200 .218 .286 .218 .205 89.5 - 19.6 3.36
RP MLB Percentile 2 4 82 98 94 85 96 99 73 78 96 99 28 - 14 78
RP MLB AVG 22.9% 9.3% .241 .393 .711 .310 .291 .321 .238 .314 .283 .363 88.4 89.8 13.0 4.19
Career 14.1% 6.4% .317 .491 .858 .367 .349 .371 .145 .230 .219 .317 88.7 90.6 21.3 3.66

Casey Kelly 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%
2018 SF 20.6% (91.4) 10.7% (91.2) - 7.3% (86.2) - 15.3% (81.8) 7.3% (86.6) - - 31.4% 29.9%
2024 CIN 25.6% (90.9) 16.7% (89.5) - 25.6% (84.8) - 11.5% (80.1) 20.5% (84.6) - - 42.3% 57.7%
2025 ARI 41.7% (91.5) 16.7% (91.3) - 20.8% (85.3) - 4.2% (80.7) 16.7% (85.6) - - 58.3% 41.7%
RP MLB Percentile - - - - - - - - - 79.1% 21.4%
RP MLB AVG 40.6% (94.6) 27.4% (93.9) 20.4% (89.5) 27.9% (85.9) 21.2% (82.2) 16.9% (79.8) 16.4% (86.2) 18.4% (86.5) 16.9% (64.1) 48.0% 51.9%
Career 22.6% (91.3) 12.1% (90.8) - 11.2% (85.6) - 14.0% (81.5) 10.1% (85.8) - - 34.6% 35.3%

Casey Kelly 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%
2018 SF 27.4% (9) 18.4% (0) - 46.2% (8) - 25.9% (7) 42.3% (8) - - 24.3% 63.2%
2024 CIN 25.0% (3) 23.1% (0) - 25.0% (4) - 44.4% (2) 25.0% (3) - - 24.2% 28.9%
2025 ARI 20.0% (0) 25.0% (0) - 20.0% (1) - 0.0% (0) 25.0% (1) - - 21.4% 20.0%
RP MLB Percentile 18 (-) 38 (-) - 18 (-) - 1 (-) 38 (-) - - 4.4% 3.0%
RP MLB AVG 27.6% (33) 27.8% (12) 26.1% (16) 29.7% (30) 28.7% (20) 28.2% (17) 22.0% (17) 23.4% (22) 14.2% (0) 28.0% 28.9%
Career 26.2% (12) 20.0% (0) - 35.3% (13) - 28.1% (9) 34.8% (12) - - 24.1% 50.9%

Casey Kelly 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
2018 SF - - - - - - - - 17.2% - - - - -
2024 CIN 37.5% 12.5% 31.3% 18.8% 25.0% 43.8% 25.0% 31.3% 19.2% 75.1% 18.8% 0.0% 6.3% 25.0%
2025 ARI 40.0% 20.0% 0.0% 40.0% 20.0% 20.0% 40.0% 40.0% 12.5% 80.0% 20.0% 0.0% 0.0% 20.0%
RP MLB Percentile 36 68 2 99 99 2 93 98 3 99 85 98 98 99
RP MLB AVG 44.2% 22.0% 23.8% 10.1% 35.1% 40.8% 33.7% 25.5% 18.0% 61.7% 24.4% 6.3% 7.6% 38.1%
Career 38.1% 14.3% 23.8% 23.8% 23.8% 38.1% 28.6% 33.3% 17.3% 76.2% 19.0% 0.0% 4.8% 4.9%

Casey Kelly 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%
2018 SF .292 .338 .316 .341 - - - - - - - - - -
2024 CIN .263 .316 .267 .313 .248 .300 .248 .350 88.4 90.6 21.9 20.0% 25.0% 19.0%
2025 ARI .200 .262 .200 .200 .218 .286 .218 .205 89.5 - 19.6 - 20.0% 16.7%
RP MLB Percentile 82 85 96 99 73 78 96 99 28 - 14 - 99 98
RP MLB AVG .241 .310 .291 .321 .238 .314 .283 .363 88.4 89.8 13.0 18.1% 38.1% 25.4%
Career .317 .367 .349 .371 .145 .230 .219 .317 88.7 90.6 21.3 80.0% 4.9% 3.8%

Casey Kelly 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
2018 SF - 66.9% 52.3% - 22.7% 17.2% 77.3% - - 14.7% 11.9% 26.6% 23.2% 59.0% 0.41 -
2024 CIN 44.9% 66.7% 55.1% 39.5% 27.9% 19.2% 72.1% 88.5% 47.1% 11.5% 15.4% 26.9% 20.5% 60.3% 0.46 56.4%
2025 ARI 37.5% 54.2% 41.7% 20.0% 20.0% 12.5% 80.0% 85.7% 66.7% 12.5% 8.3% 20.8% 20.8% 50.0% 0.08 45.8%
RP MLB Percentile 2 2 6 2 13 3 13 29 13 6 6 2 94 2 2 9
RP MLB AVG 47.0% 63.9% 47.7% 30.2% 26.2% 18.0% 73.8% 82.9% 56.2% 16.2% 12.5% 28.7% 17.1% 58.4% 0.51 50.8%
Career 9.6% 63.8% 52.2% 34.5% 23.5% 17.3% 76.5% 87.9% 50.0% 14.0% 12.3% 26.3% 22.6% 58.8% 0.40 64.0%

Casey Kelly Approach › Locations

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Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2018 SF - - - - - - - - - -
2024 CIN 44.9% 32.1% 37.2% 30.8% 28.2% 21.8% 50.0% 20.5% 42.3% 7.7%
2025 ARI 37.5% 25.0% 41.7% 33.3% 37.5% 20.8% 41.7% 12.5% 45.8% 12.5%
RP MLB Percentile 2 8 2 20 81 92 38 2 59 99
RP MLB AVG 47.0% 34.2% 26.4% 39.4% 30.5% 25.1% 44.4% 29.4% 44.2% 7.0%
Career 9.6% 30.4% 38.2% 31.4% 30.4% 21.6% 48.0% 18.6% 43.1% 8.8%

Casey Kelly Approach › Counts

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Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2018 SF 66.1% 7.6% 26.8% 19.2% 59.2% 45.6% 20.9% - 15.8%
2024 CIN 59.0% 10.3% 30.8% 19.6% 66.7% 42.9% 15.2% 20.8% 16.7%
2025 ARI 62.5% 16.7% 20.8% 20.0% 66.7% 66.7% 13.3% 20.0% 0.0%
RP MLB Percentile 95 4 2 96 87 98 2 15 2
RP MLB AVG 58.5% 11.9% 30.1% 14.4% 61.4% 50.4% 21.0% 24.2% 19.4%
Career 64.7% 8.6% 27.2% 19.3% 60.8% 46.2% 19.7% 4.8% 15.3%

Casey Kelly PLV

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Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2018 SF 354 - - - - - - - - -
2024 CIN 78 - - - - - - - - -
2025 ARI 24 4.55 41.7% 12.5% 45.8% -4.2% 4.2% 0.4 +1 3.98
RP MLB Percentile 2 2 14 2 2 2 81 68 62 4
RP MLB AVG 840 5.00 46.1% 18.1% 35.8% 10.4% 5.9% 3.8 +3 2.31
Career 1,538 4.55 41.7% 12.5% 45.8% -4.2% 4.2% 0.4 +1 0.95
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