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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

MLB Rank MLB Average
W-L IP ERA WHIP K% BB%
8-8 109.1 4.86 1.45 15.0% 8.9%
28th 5
W
50th 83.0
IP
138th 4.40
ERA
153rd 1.31
WHIP
181st 21.6%
K%
130th 8.5%
BB%
FB MPH SwStr% CSW% Str-ICR MTK% PLV PLA
92.1 10.3% 24.5% 45.1% 4.4% 4.99 3.18
170th 94.3
FB MPH
138th 11.6%
SwStr%
185th 27.7%
CSW%
190th 50.0%
Str-ICR
77th 4.9%
MTK%
88th 4.97
PLV
73rd 3.29
PLA
The List
Rank
89th

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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 19 19 109.1 8-8 7 4.86 1.45 7.27 5.67 4.91 3.18 15.0% 8.9% 9.5 1.81 .282 26.5% 76.0% 44.1% 41.4% 10.3% 24.5% 0.35 4.99
SP MLB Percentile 50 64 74 81-8 65 31 22 1 11 20 63 9 35 20 15 54 11 66 7 41 31 6 7 51
SP MLB AVG 17 15 83.0 5-5 5 4.40 1.31 4.42 4.36 4.27 3.29 21.6% 8.5% 8.5 1.28 .287 19.5% 72.6% 38.5% 42.9% 11.6% 27.7% 0.47 4.97
Career 191 191 1,117.2 73-61 95 3.87 1.22 4.54 4.15 4.08 2.67 21.3% 7.4% 8.2 1.22 .281 23.6% 74.6% 32.7% 45.4% 11.3% 27.7% 0.48 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

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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
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 19 19 109.1 8-8 7 0 0 1,746 1,102 643 473 116 70 21 3 22 71 42 3 0
SP MLB Percentile 50 64 74 81-8 65 0 0 72 70 23 79 7 18 17 6 3 45 10 43 80
SP MLB AVG 17 15 83.0 5-5 5 0 0 1,366 874 493 353 77 50 15 1 11 77 29 4 2
Career 191 191 1,117.2 73-61 95 0 0 17,455 11,343 6,109 4,615 1,023 634 217 20 152 982 341 20 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 15.0% 8.9% .275 .495 .837 .359 .282 .327 .316 .419 .316 .468 90.0 93.6 12.9 7.27
SP MLB Percentile 9 35 17 14 14 16 54 42 1 1 12 1 15 4 60 1
SP MLB AVG 21.6% 8.5% .246 .414 .730 .320 .287 .321 .246 .325 .285 .375 88.5 90.0 13.9 4.42
Career 21.3% 7.4% .242 .411 .712 .311 .281 .314 .243 .324 .290 .392 89.0 91.2 12.7 4.54

Merrill 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%
2019 ARI7.1% (92.1)1.4% (92.1)3.3% (90.4)--3.9% (81.1)2.7% (86.5)-- 8.5% 9.9%
2020 ARI30.4% (92.0)15.6% (92.0)13.7% (90.6)0.4% (89.7)-22.2% (81.2)17.6% (87.9)-- 46.1% 53.9%
2021 ARI32.5% (91.7)18.5% (91.6)14.0% (90.9)--18.1% (81.3)17.0% (87.2)-- 51.0% 49.0%
2022 ARI29.2% (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 ARI30.0% (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 ARI19.8% (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/TEX22.7% (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 ARI26.0% (92.1)9.7% (92.4)15.3% (91.1)10.8% (86.4)-11.4% (82.6)26.9% (88.5)-- 35.6% 64.4%
SP MLB Percentile 29 (14) 21 (28) 52 (79) 29 (50) - 47 (75) 85 (75) - - 8.0% 91.5%
SP MLB AVG 33.5% (94.3) 20.0% (93.7) 16.4% (89.2) 18.0% (86.1) 16.3% (82.2) 14.2% (80.1) 17.0% (86.3) 17.5% (86.4) 28.5% (80.8) 46.7% 53.3%
Career24.1% (92.1)12.3% (92.2)15.5% (90.8)3.9% (85.8)-11.1% (81.8)19.2% (88.3)-- 36.4% 49.8%

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 ARI30.5% (20)11.9% (3)17.2% (7)--29.8% (10)17.3% (8)-- 27.4% 22.1%
2020 ARI26.4% (11)31.1% (8)24.6% (3)0.0% (0)-39.0% (11)28.9% (18)-- 28.0% 31.8%
2021 ARI29.9% (64)24.6% (28)26.0% (35)--32.0% (55)21.9% (62)-- 28.0% 26.8%
2022 ARI31.6% (99)26.6% (41)24.7% (61)16.7% (1)-37.7% (44)23.1% (106)-- 29.8% 27.3%
2023 ARI33.4% (98)26.0% (28)28.3% (59)29.0% (33)-31.8% (32)23.6% (121)-- 31.3% 27.2%
2024 ARI31.9% (20)21.7% (7)26.8% (15)29.6% (28)-31.5% (8)23.0% (39)-- 27.6% 26.7%
2025 ARI/TEX34.1% (66)22.3% (22)28.4% (46)24.4% (32)-35.4% (23)24.8% (148)-- 29.6% 27.5%
2026 ARI26.3% (25)19.5% (6)21.7% (17)26.1% (33)-29.1% (14)23.4% (85)-- 24.4% 24.5%
SP MLB Percentile 39 (32) 7 (29) 15 (54) 29 (67) - 41 (49) 55 (95) - - 11.5% 14.5%
SP MLB AVG 27.1% (44) 26.6% (14) 27.2% (20) 28.5% (30) 27.6% (22) 29.8% (22) 23.1% (29) 21.9% (36) 24.7% (14) 27.3% 27.9%
Career31.2% (403)24.2% (143)26.0% (243)26.8% (127)-33.6% (197)23.5% (587)-- 28.9% 26.8%

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 41.4% 26.5% 23.4% 8.7% 42.0% 45.8% 34.6% 19.7% 18.3% 55.8% 23.9% 7.0% 13.2% 44.1%
SP MLB Percentile 41 6 38 34 7 79 65 10 49 7 58 30 2 7
SP MLB AVG 42.9% 22.3% 24.6% 10.2% 35.8% 42.3% 33.2% 24.5% 18.3% 61.3% 24.6% 6.3% 7.9% 38.5%
Career 45.4% 21.3% 23.9% 9.5% 35.5% 46.5% 32.3% 21.2% 18.5% 60.3% 24.5% 6.4% 8.7% 32.7%

Merrill 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%
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 .275 .359 .282 .327 .316 .419 .316 .468 90.0 93.6 12.9 26.5% 44.1% 33.2%
SP MLB Percentile 17 16 54 42 1 1 12 1 15 4 60 11 7 4
SP MLB AVG .246 .320 .287 .321 .246 .325 .285 .375 88.5 90.0 13.9 19.5% 38.5% 26.5%
Career .242 .311 .281 .314 .243 .324 .290 .392 89.0 91.2 12.7 23.6% 32.7% 23.2%

Merrill 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
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 41.5% 63.1% 49.0% 35.6% 21.1% 18.3% 78.9% 87.8% 67.0% 14.1% 10.3% 24.5% 20.4% 56.5% 0.35 45.1%
SP MLB Percentile 10 39 69 87 21 49 21 25 13 11 31 6 90 24 7 5
SP MLB AVG 44.9% 63.7% 47.6% 31.6% 24.3% 18.3% 75.7% 85.0% 59.7% 16.1% 11.6% 27.7% 17.8% 58.0% 0.47 50.0%
Career 37.1% 65.0% 48.5% 32.8% 23.2% 18.5% 76.8% 85.2% 62.3% 16.5% 11.3% 27.7% 18.7% 59.1% 0.48 52.7%

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 41.5% 40.2% 25.0% 34.8% 24.9% 21.4% 53.7% 24.3% 50.7% 4.8%
SP MLB Percentile 10 78 84 38 6 75 95 11 93 2
SP MLB AVG 44.9% 36.0% 27.4% 36.6% 35.4% 22.8% 41.8% 29.0% 43.6% 6.6%
Career 37.1% 37.4% 24.2% 38.4% 20.0% 25.7% 54.4% 25.5% 50.3% 6.0%

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 61.0% 11.9% 27.4% 18.7% 60.9% 47.1% 17.5% 33.0% 14.8%
SP MLB Percentile 88 47 18 96 44 22 9 98 12
SP MLB AVG 58.8% 12.0% 29.4% 15.1% 61.2% 49.7% 20.7% 26.6% 18.9%
Career 59.4% 12.4% 28.5% 16.3% 61.6% 49.6% 20.5% 23.1% 19.7%

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 1,746 4.99 45.5% 20.3% 34.2% 11.3% 4.4% 25.8 +17 3.18
SP MLB Percentile 72 51 42 90 77 77 60 4 8 63
SP MLB AVG 1,366 4.97 46.0% 17.8% 36.2% 9.8% 4.9% 4.5 +1 3.29
Career 17,455 5.00 45.1% 18.9% 36.0% 9.1% 6.7% 53.5 +51 2.67
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