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Merrill Kelly

#29 - Starting Pitcher

Arizona Diamondbacks

Bats / Throws Right / Right
Date of Birth 10/14/1988 (37)
Height, Weight 6'2", 202 lb
Hometown Houston, TX

2026 Season Stats

Needs more playing time to qualify
MLB Rank MLB Average
W-L IP ERA WHIP K% BB%
4-3 41.0 5.71 1.51 14.9% 9.9%
- 2
W
- 39.0
IP
- 4.70
ERA
- 1.37
WHIP
- 21.3%
K%
- 9.5%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
91.9 11.7% 26.1% 41.1% 3.8% 4.97 3.31
- 94.2
FB MPH
- 11.4%
SwStr%
- 27.6%
CSW%
- 49.6%
Str-ICR
- 4.7%
MTK%
- 4.97
PLV
- 3.33
PLA
The List
Rank
51st

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Merrill Kelly Overview

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L QS ERA WHIP xERA FIP xFIP PLA K% BB% H/9 HR/9 BABIP HR/FB% LOB% ICR GB% SwStr% CSW% IPR PLV
2019 ARI 32 32 183.1 13-14 15 4.42 1.31 - 4.51 - 0.00 20.3% 7.3% 9.0 1.42 .294 - 73.1% - - 10.5% 27.4% 0.45 -
2020 ARI 5 5 31.1 3-2 4 2.59 0.99 4.23 4.00 4.00 3.12 23.2% 4.0% 7.5 1.44 .247 21.7% 92.0% 38.9% 47.7% 10.8% 30.0% 0.52 5.03
2021 ARI 27 27 158.0 7-11 10 4.44 1.29 4.71 4.11 4.37 3.54 19.5% 6.1% 9.3 1.20 .305 17.9% 70.5% 41.3% 46.7% 10.1% 27.4% 0.47 4.96
2022 ARI 33 33 200.1 13-8 18 3.37 1.14 3.65 3.65 3.84 3.03 22.0% 7.6% 7.5 0.94 .269 15.4% 76.3% 34.6% 44.9% 11.5% 28.4% 0.51 5.02
2023 ARI 30 30 177.2 12-8 18 3.29 1.19 4.11 3.85 3.82 3.30 25.9% 9.4% 7.2 1.01 .279 20.0% 77.1% 38.5% 46.8% 13.2% 28.9% 0.54 5.02
2024 ARI 13 13 73.2 5-1 5 4.03 1.17 4.81 4.26 4.26 3.19 21.0% 6.3% 8.2 1.34 .275 18.3% 73.0% 41.9% 46.5% 10.2% 27.0% 0.46 4.97
2025 ARI/TEX 32 32 184.0 12-9 18 3.52 1.11 4.08 3.76 3.80 3.01 22.3% 6.4% 7.7 1.13 .264 18.4% 73.2% 39.9% 45.5% 11.9% 28.3% 0.50 5.01
2026 ARI 7 7 41.0 4-3 3 5.71 1.51 7.87 5.65 5.10 3.31 14.9% 9.9% 9.7 1.76 .283 22.2% 70.9% 48.5% 33.1% 11.7% 26.1% 0.33 4.97
SP MLB Percentile - - - --- - - - - - - - - - - - - - - - - - - - -
SP MLB AVG 8 7 39.0 2-2 2 4.70 1.37 4.51 4.50 4.30 3.33 21.3% 9.5% 8.5 1.24 .286 19.0% 71.9% 38.7% 43.7% 11.4% 27.6% 0.47 4.97
Career 179 179 1,049.1 69-56 91 3.84 1.21 4.35 4.05 4.02 2.65 21.7% 7.3% 8.2 1.18 .281 23.1% 74.3% 32.1% 45.3% 11.4% 28.0% 0.49 5.00

Merrill Kelly Repertoire

2019 2020 2021 2022 2023 2024 2025 2026 All
Hide MLB Percentile | Hide MLB Average

Merrill Kelly Game Log

Merrill Kelly Standard

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team G GS IP W-L QS Sv Hld P Strikes Balls TBF H 1B 2B 3B HR K BB HB WP
2019 ARI 32 32 183.1 13-14 15 0 0 2,962 1,896 1,064 777 184 113 38 4 29 158 57 2 4
2020 ARI 5 5 31.1 3-2 4 0 0 473 308 165 125 26 15 6 0 5 29 5 1 0
2021 ARI 27 27 158.0 7-11 10 0 0 2,425 1,610 815 667 163 107 31 4 21 130 41 4 2
2022 ARI 33 33 200.1 13-8 18 0 0 3,071 2,011 1,060 804 167 104 40 2 21 177 61 2 4
2023 ARI 30 30 177.2 12-8 18 0 0 2,803 1,814 989 721 143 90 30 3 20 187 68 4 3
2024 ARI 13 13 73.2 5-1 5 0 0 1,142 741 400 300 67 39 16 1 11 63 19 2 1
2025 ARI/TEX 32 32 184.0 12-9 18 0 0 2,833 1,861 973 748 157 96 35 3 23 167 48 2 1
2026 ARI 7 7 41.0 4-3 3 0 0 664 405 259 181 44 23 11 2 8 27 18 0 0
SP MLB Percentile - - - --- - - - - - - - - - - - - - - - -
SP MLB AVG 8 7 39.0 2-2 2 0 0 653 415 238 168 36 24 7 1 5 37 15 2 1
Career 179 179 1,049.1 69-56 91 0 0 16,373 10,646 5,725 4,323 951 587 207 19 138 938 317 17 15

Merrill Kelly 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
2019 ARI 20.3% 7.3% .260 .447 .761 .319 .294 .331 - - - - - - - -
2020 ARI 23.2% 4.0% .218 .395 .651 .275 .247 .289 .244 .310 .281 .390 88.5 93.2 13.3 4.23
2021 ARI 19.5% 6.1% .266 .433 .748 .319 .305 .335 .271 .330 .304 .383 88.3 89.7 12.2 4.71
2022 ARI 22.0% 7.6% .226 .371 .657 .289 .269 .297 .227 .300 .264 .351 88.0 91.3 13.5 3.65
2023 ARI 25.9% 9.4% .222 .371 .670 .294 .279 .310 .234 .309 .293 .373 89.1 90.4 11.7 4.11
2024 ARI 21.0% 6.3% .242 .426 .720 .311 .275 .312 .264 .343 .294 .410 90.0 94.5 11.1 4.81
2025 ARI/TEX 22.3% 6.4% .226 .384 .661 .287 .264 .296 .248 .317 .286 .381 89.8 89.6 13.3 4.08
2026 ARI 14.9% 9.9% .273 .516 .860 .371 .283 .326 .331 .444 .338 .498 90.9 91.6 15.3 7.87
SP MLB Percentile - - - - - - - - - - - - - - - -
SP MLB AVG 21.3% 9.5% .244 .405 .727 .324 .286 .318 .246 .332 .285 .377 88.6 90.3 13.7 4.51
Career 21.7% 7.3% .240 .407 .705 .312 .281 .313 .238 .320 .289 .390 89.0 90.9 12.8 4.35

Merrill Kelly 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%
2019 ARI 7.1% (92.1) 1.4% (92.1) 3.3% (90.4) - - 3.8% (81.1) 2.7% (86.5) - - 8.5% 9.9%
2020 ARI 30.4% (92.0) 15.6% (92.0) 13.7% (90.6) 0.4% (89.7) - 22.2% (81.2) 17.5% (87.9) - - 46.1% 53.9%
2021 ARI 32.5% (91.7) 18.5% (91.6) 14.0% (90.9) - - 18.1% (81.3) 16.9% (87.2) - - 51.0% 49.0%
2022 ARI 29.2% (92.6) 17.0% (92.6) 18.3% (90.9) 0.2% (85.0) - 13.5% (82.2) 21.8% (88.6) - - 46.2% 53.8%
2023 ARI 30.0% (92.2) 12.2% (92.4) 18.1% (90.8) 5.5% (85.4) - 11.0% (82.1) 23.1% (88.7) - - 42.2% 57.8%
2024 ARI 19.8% (91.9) 14.5% (92.3) 25.1% (90.3) 11.8% (85.6) - 7.8% (82.2) 20.9% (88.4) - - 34.3% 65.7%
2025 ARI/TEX 22.7% (91.8) 13.6% (92.2) 20.5% (90.6) 7.0% (85.8) - 9.7% (81.7) 26.5% (88.3) - - 36.3% 63.6%
2026 ARI 26.5% (91.9) 8.0% (92.4) 14.6% (91.0) 13.1% (86.3) - 10.4% (82.0) 27.4% (88.2) - - 34.5% 65.5%
SP MLB Percentile - - - - - - - - - - -
SP MLB AVG 33.2% (94.2) 20.5% (93.6) 17.1% (89.2) 18.7% (86.2) 16.0% (82.3) 14.6% (80.0) 16.9% (86.3) 20.5% (86.4) 27.6% (80.5) 46.7% 53.2%
Career 24.0% (92.1) 12.4% (92.2) 15.5% (90.7) 3.6% (85.7) - 11.1% (81.7) 18.7% (88.3) - - 36.4% 48.8%

Merrill Kelly 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%
2019 ARI 30.5% (20) 11.9% (3) 17.2% (7) - - 29.8% (10) 17.3% (8) - - 27.4% 253.1%
2020 ARI 26.4% (11) 31.1% (8) 24.6% (3) 0.0% (0) - 39.0% (11) 28.9% (18) - - 28.0% 31.8%
2021 ARI 29.9% (64) 24.6% (28) 26.0% (35) - - 32.0% (55) 21.9% (62) - - 28.0% 26.8%
2022 ARI 31.6% (99) 26.6% (41) 24.7% (61) 16.7% (1) - 37.7% (44) 23.1% (106) - - 29.8% 27.3%
2023 ARI 33.4% (98) 26.0% (28) 28.3% (59) 29.0% (33) - 31.8% (32) 23.6% (121) - - 31.3% 27.2%
2024 ARI 31.9% (20) 21.7% (7) 26.8% (15) 29.6% (28) - 31.5% (8) 23.0% (39) - - 27.6% 26.7%
2025 ARI/TEX 34.1% (66) 22.3% (22) 28.4% (46) 24.4% (32) - 35.4% (23) 24.8% (148) - - 29.6% 27.5%
2026 ARI 25.0% (12) 24.5% (2) 28.9% (8) 29.9% (17) - 29.0% (7) 23.1% (32) - - 24.9% 26.7%
SP MLB Percentile - - - - - - - - - - -
SP MLB AVG 27.0% (21) 26.7% (7) 26.6% (11) 29.5% (17) 28.0% (13) 29.4% (12) 23.4% (16) 23.3% (22) 27.3% (11) 27.3% 27.7%
Career 31.5% (390) 24.6% (139) 26.5% (234) 27.5% (111) - 33.9% (190) 23.4% (534) - - 29.2% 35.6%

Merrill Kelly 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
2019 ARI - - - - - - - - 17.7% - - - - -
2020 ARI 47.7% 14.8% 26.1% 11.4% 38.6% 53.3% 25.6% 21.1% 16.1% 60.1% 22.7% 6.8% 10.2% 38.9%
2021 ARI 46.7% 21.1% 23.8% 8.3% 35.8% 44.7% 31.5% 23.8% 18.7% 58.7% 27.8% 7.1% 6.3% 41.3%
2022 ARI 44.9% 20.9% 24.2% 10.0% 32.4% 45.2% 33.3% 21.5% 18.7% 65.3% 22.1% 4.8% 7.8% 34.6%
2023 ARI 46.8% 22.3% 21.6% 9.3% 35.7% 48.1% 33.5% 18.4% 19.3% 61.5% 24.9% 6.1% 7.6% 38.5%
2024 ARI 46.5% 18.3% 28.2% 7.5% 34.3% 47.4% 31.6% 20.9% 19.1% 58.1% 25.8% 6.1% 10.3% 41.9%
2025 ARI/TEX 45.5% 19.7% 23.7% 11.2% 34.1% 47.3% 30.5% 22.2% 18.7% 59.9% 23.7% 7.6% 8.9% 39.9%
2026 ARI 33.1% 33.8% 26.5% 6.6% 48.5% 43.4% 38.2% 18.4% 14.5% 51.5% 25.7% 5.1% 17.6% 48.5%
SP MLB Percentile - - - - - - - - - - - - - -
SP MLB AVG 43.7% 22.1% 23.8% 10.5% 35.3% 42.8% 32.5% 24.8% 18.1% 61.1% 24.4% 6.2% 8.4% 38.7%
Career 45.3% 21.2% 24.1% 9.4% 35.3% 46.5% 32.2% 21.3% 18.4% 60.6% 24.6% 6.3% 8.5% 32.1%

Merrill Kelly 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%
2019 ARI .260 .319 .294 .331 - - - - - - - - - -
2020 ARI .218 .275 .247 .289 .244 .310 .281 .390 88.5 93.2 13.3 21.7% 38.9% 28.0%
2021 ARI .266 .319 .305 .335 .271 .330 .304 .383 88.3 89.7 12.2 17.9% 41.3% 30.4%
2022 ARI .226 .289 .269 .297 .227 .300 .264 .351 88.0 91.3 13.5 15.4% 34.6% 24.3%
2023 ARI .222 .294 .279 .310 .234 .309 .293 .373 89.1 90.4 11.7 20.0% 38.5% 24.7%
2024 ARI .242 .311 .275 .312 .264 .343 .294 .410 90.0 94.5 11.1 18.3% 41.9% 30.0%
2025 ARI/TEX .226 .287 .264 .296 .248 .317 .286 .381 89.8 89.6 13.3 18.4% 39.9% 28.3%
2026 ARI .273 .371 .283 .326 .331 .444 .338 .498 90.9 91.6 15.3 22.2% 48.5% 36.5%
SP MLB Percentile - - - - - - - - - - - - - -
SP MLB AVG .244 .324 .286 .318 .246 .332 .285 .377 88.6 90.3 13.7 19.0% 38.7% 26.4%
Career .240 .312 .281 .313 .238 .320 .289 .390 89.0 90.9 12.8 23.1% 32.1% 22.6%

Merrill Kelly 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
2019 ARI - 64.0% 47.1% - 22.4% 17.7% 77.6% - - 16.9% 10.5% 27.4% 18.8% 57.8% 0.45 -
2020 ARI 47.1% 65.1% 45.9% 28.0% 23.5% 16.1% 76.5% 83.7% 61.4% 19.2% 10.8% 30.0% 19.0% 59.6% 0.52 50.3%
2021 ARI 49.4% 66.4% 49.1% 28.8% 20.5% 18.7% 79.5% 87.6% 60.5% 17.3% 10.1% 27.4% 20.3% 59.7% 0.47 49.6%
2022 ARI 46.4% 65.5% 48.5% 31.1% 23.6% 18.7% 76.4% 82.5% 64.6% 17.0% 11.5% 28.4% 18.4% 60.0% 0.51 52.8%
2023 ARI 42.1% 64.7% 49.1% 35.1% 27.0% 19.3% 73.0% 82.6% 59.5% 15.7% 13.2% 28.9% 16.5% 59.6% 0.54 52.0%
2024 ARI 42.3% 64.9% 48.2% 32.2% 21.3% 19.1% 78.7% 88.2% 63.7% 16.7% 10.2% 27.0% 18.8% 59.0% 0.46 49.1%
2025 ARI/TEX 44.1% 65.7% 49.3% 34.7% 24.1% 18.7% 75.9% 85.8% 60.5% 16.4% 11.9% 28.3% 18.7% 60.1% 0.50 50.7%
2026 ARI 40.8% 61.0% 46.7% 32.3% 25.2% 14.5% 74.8% 83.6% 62.2% 14.3% 11.7% 26.1% 20.5% 54.4% 0.33 41.1%
SP MLB Percentile - - - - - - - - - - - - - - - -
SP MLB AVG 44.7% 63.2% 47.0% 31.3% 24.2% 18.1% 75.8% 85.1% 59.9% 16.2% 11.4% 27.6% 17.5% 57.7% 0.47 49.6%
Career 36.8% 65.0% 48.4% 32.4% 23.5% 18.4% 76.5% 84.8% 61.5% 16.6% 11.4% 28.0% 18.6% 59.2% 0.49 53.1%

Merrill Kelly Approach › Locations

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Zone% aLoc% x-mLoc% gLoc% hiLoc% y-mLoc% loLoc% iLoc% oLoc% mmLoc%
2019 ARI - - - - - - - - - -
2020 ARI 47.1% 34.0% 22.2% 43.8% 20.3% 27.3% 52.4% 29.8% 48.0% 5.1%
2021 ARI 49.4% 34.2% 24.1% 41.7% 18.7% 28.7% 52.7% 27.1% 48.8% 7.1%
2022 ARI 46.4% 34.6% 24.3% 41.1% 18.9% 28.5% 52.6% 24.9% 50.8% 6.2%
2023 ARI 42.1% 39.7% 24.6% 35.6% 21.0% 24.3% 54.7% 27.0% 48.3% 5.7%
2024 ARI 42.3% 40.7% 20.6% 38.7% 15.5% 25.9% 58.6% 22.9% 56.5% 5.6%
2025 ARI/TEX 44.1% 38.1% 25.0% 36.8% 19.8% 23.6% 56.6% 24.2% 50.7% 6.0%
2026 ARI 40.8% 41.6% 24.1% 34.3% 24.1% 20.8% 55.1% 23.0% 52.9% 5.0%
SP MLB Percentile - - - - - - - - - -
SP MLB AVG 44.7% 35.5% 27.5% 37.1% 35.3% 22.7% 42.0% 29.5% 43.1% 6.6%
Career 36.8% 37.2% 24.1% 38.7% 19.5% 26.0% 54.5% 25.5% 50.4% 6.1%

Merrill Kelly Approach › Counts

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team Early% Behind% 2-Str% Early BIP% F-Str% TF-Str% ECS% 2-Str O-Sw% PAR%
2019 ARI 59.0% 13.4% 27.7% 15.6% 58.5% 47.2% 21.3% - 19.1%
2020 ARI 60.0% 13.3% 26.8% 16.5% 59.2% 48.8% 21.1% 29.1% 22.8%
2021 ARI 61.1% 12.6% 26.8% 17.8% 61.7% 48.0% 21.6% 21.8% 19.7%
2022 ARI 58.9% 13.2% 28.2% 15.4% 62.2% 51.1% 20.7% 25.4% 20.5%
2023 ARI 58.0% 10.8% 31.5% 14.5% 61.3% 50.8% 20.2% 29.8% 21.2%
2024 ARI 57.6% 14.5% 28.1% 16.4% 62.9% 49.7% 19.3% 30.5% 19.6%
2025 ARI/TEX 59.7% 11.1% 29.3% 16.6% 64.6% 52.4% 21.0% 27.8% 20.1%
2026 ARI 61.7% 13.4% 25.5% 18.8% 63.2% 46.7% 17.3% 32.5% 16.0%
SP MLB Percentile - - - - - - - - -
SP MLB AVG 58.5% 12.3% 29.3% 15.0% 60.9% 49.6% 20.9% 26.6% 18.7%
Career 59.3% 12.5% 28.5% 16.1% 61.7% 49.7% 20.7% 22.4% 20.0%

Merrill Kelly PLV

Hide 2026 MLB Percentile | Hide 2026 MLB Average
Year Team P PLV QP% AP% BP% Q-BP% MTK% HP HL PLA
2019 ARI 2,962 - - - - - - - - 0.00
2020 ARI 473 5.03 43.8% 20.5% 35.7% 8.0% 8.0% -1.9 -1 3.12
2021 ARI 2,425 4.96 44.1% 18.4% 37.6% 6.5% 7.8% 9.2 +25 3.54
2022 ARI 3,071 5.02 45.5% 17.8% 36.7% 8.8% 6.7% 5.5 +7 3.03
2023 ARI 2,803 5.02 45.3% 20.0% 34.6% 10.7% 6.2% 5.0 -6 3.30
2024 ARI 1,142 4.97 46.1% 17.4% 36.5% 9.6% 7.1% 8.1 +8 3.19
2025 ARI/TEX 2,833 5.01 45.0% 18.7% 36.3% 8.6% 7.5% 1.8 +2 3.01
2026 ARI 664 4.97 45.8% 20.0% 34.2% 11.6% 3.8% 10.4 +7 3.31
SP MLB Percentile - - - - - - - - - -
SP MLB AVG 653 4.97 46.4% 17.3% 36.2% 10.2% 4.7% 1.9 +0 3.33
Career 16,373 5.00 45.1% 18.7% 36.2% 8.9% 6.9% 38.0 +42 2.65
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