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Merrill Kelly
Arizona Diamondbacks · SP Throws: R Bats: R Height: 6'2 Weight: 202 Born: Oct 14, 1988 (36)
Percentile Ranks
vs LHH
vs RHH
K%
nan
nan
xWOBA
0.334 · %
0.349 · %
xSLG
nan
nan
 

Year Team G GS W-L IP ERA WHIP K% CSW% BB% xAVG xSLG xwOBA xISO BAR% SS% HH% GB% LD% FB% Z%
Z
Sw%
OZ%
OZ
Sw%
Apr May Jun Jul Aug Sep
2025994-251.03.711.0619.9%0.0%5.8%.270.477.340.20710.5%30.9%45%45%20%28%49%13%51%39% 14.0 18.8 0.0 0.0 0.0 0.0
202413135-173.24.031.1721.0%0.0%6.3%.263.470.340.20710.7%33.5%41%43%23%30%47%13%53%38% 16.2 0.0 0.0 0.0 6.6 17.6
2023303012-8177.23.291.1925.9%0.0%9.4%.244.389.313.1457.8%35.1%42%46%24%24%46%18%55%42% 16.3 26.2 17.7 14.9 17.3 19.7
2022Diamondbacks333313-8200.13.371.1422.0%0.0%7.6%.230.383.296.1538.3%31.2%37%44%22%28%49%18%51%36% 19.7 8.3 16.4 24.0 18.5 15.7
2021Diamondbacks27277-11158.04.441.2719.6%0.0%5.7%.271.432.324.1616.3%33.1%40%45%25%24%51%13%49%41% 14.8 16.9 16.2 0.0 0.0 15.1
2020Diamondbacks553-231.12.590.9623.4%0.0%3.2%.245.437.304.19211.1%36.7%40%46%23%19%49%17%51%38% 0.0 0.0 0.0 0.0 0.0 0.0
2019Diamondbacks323213-14183.14.421.2920.4%0.0%6.9%.271.493.345.2229.5%33.2%40%43%25%26%48%16%53%35% 0.0 0.0 0.0 0.0 0.0 0.0


2025 Splits vs LHB vs RHB
Pitch Type MPH SPIN Whiff% Usage xBAVG xWOBA K% BB% xSLG ISO HR Usage xBAVG xWOBA K% BB% xSLG ISO HR
4-SeamerFastball MPH0%34%.263.39419.46.5.632.448321%.308.48730.80.0.846.2862
CutterFastball90.3 MPH234816%14%.193.22031.65.3.259.056019%.000.9770.00.0.376.5581
SinkerFastball92.2 MPH22150%7%.234.38730.830.8.346.111019%.346.36714.80.0.462.4090
CurveballBreaking81.6 MPH261018%17%.266.30610.05.0.400.00004%.500.44750.00.0.5001.0000
SliderBreaking85.8 MPH233935%20%.000.3760.00.0.259.2730
ChangeupOffspeed88.1 MPH215729%28%.315.34021.23.0.452.125017%.127.19631.813.6.141.0000
2024 Splits vs LHB vs RHB
Pitch Type MPH SPIN Whiff% Usage xBAVG xWOBA K% BB% xSLG ISO HR Usage xBAVG xWOBA K% BB% xSLG ISO HR
4-SeamerFastball MPH0%23%.353.56110.33.4.984.464321%.171.24143.54.3.352.1821
CutterFastball90.3 MPH238711%26%.341.47615.423.1.650.345232%.241.25310.30.0.345.2401
SinkerFastball92.4 MPH22549%10%.238.31722.713.6.291.000024%.481.55714.30.0.815.5451
CurveballBreaking82.2 MPH265221%10%.000.7000.00.0.392.46517%.200.29340.00.0.500.2001
SliderBreaking85.6 MPH238439%1%.000.3450.01.0.000.0000
ChangeupOffspeed88.4 MPH217532%29%.203.21615.83.5.249.000016%.037.07358.85.9.042.0000
2023 Splits vs LHB vs RHB
Pitch Type MPH SPIN Whiff% Usage xBAVG xWOBA K% BB% xSLG ISO HR Usage xBAVG xWOBA K% BB% xSLG ISO HR
4-SeamerFastball MPH26%31%.246.36620.615.0.483.299729%.217.29235.89.5.370.2334
CutterFastball90.8 MPH235024%16%.232.31931.312.5.370.164221%.219.28711.99.5.354.0811
SinkerFastball92.4 MPH220616%8%.233.27537.15.7.352.182117%.316.37112.97.1.480.0901
CurveballBreaking82.1 MPH256926%14%.268.36233.313.9.422.13318%.282.34417.210.3.426.1541
SliderBreaking85.4 MPH232041%0%.000.000100.00.0.000.000011%.216.26227.74.3.353.1782
ChangeupOffspeed88.7 MPH213832%31%.263.30118.65.9.382.045015%.178.22746.89.7.229.0710

Splits vs LHB vs RHB
Year PA xBAVG xWOBA xSLG ISO K% BB% HR PA xBAVG xWOBA xSLG ISO K% BB% HR
2025 116.265.334.450.17821.6%7.8%390.276.349.510.15117.8%3.3%3
2024 160.279.376.516.18414.4%10.0%6140.246.298.423.18428.6%2.1%5
2023 361.250.326.407.15824.9%10.5%11360.239.299.372.14026.9%8.3%9
2022 370.229.316.415.18119.2%9.7%12432.231.278.356.11524.5%5.3%9
  Home Road
Season PA xAVG xWOBA K% BB% xSLG ISO HR PA xAVG xWOBA K% BB% xSLG ISO HR
202596.268.33815.6%7.3%.450.1933110.271.34223.6%4.5%.499.1433
2024160.263.34719.4%5.6%.501.2037140.263.33122.9%7.1%.435.1634
2023364.222.29029.1%9.6%.355.1259357.267.33622.7%9.2%.424.17311
2022419.232.29124.3%7.2%.367.1249383.228.30219.6%7.6%.400.16712

Split Games Wind 0-9 mph+ Wind 10+ mph Humid 0-25 Humid 25-50 Humid 50-75 Humid 75-100 Temp 0-40 Temp 40-60 Temp 61-79 Temp 80+
Road 14.60 12.34 16.72 16.10 5.63 18.89 23.72 0.00 17.45 13.94 19.90
Home 17.68 11.93 18.08 19.59 0.00 14.20 0.00 0.00 0.00 17.98 17.13