MLB Player Intelligence

Merrill Kelly

SP · Arizona Diamondbacks · #29

Bats/ThrowsR/R

Height6' 2"

Weight210 lbs

BirthplaceHouston, TX

MLB Debut2018

CollegeArizona State

Draft2010: Rd 8, Pk 251 (TB)

📊Full Stat Line (2026)

G29

GS29

QS9

HLD0

H166

ER89

HR28

BB70

K/96.28

WAR0.29

🤚Career Splits by Handedness

vs Left-Handed Batters

AVG.267

OBP.354

SLG.487

OPS.841

395 PA · Ranks #479 of 640 qualified pitchers

vs Right-Handed Batters

AVG.267

OBP.317

SLG.424

OPS.741

262 PA · Ranks #390 of 659 qualified pitchers

Career totals from real plate-appearance data — lower OPS allowed is better for a pitcher.

⚔️This Season vs. Each Opponent

Opponent	ERA	IP	K	BB	Opp AVG
vs. SF	2.25	20.0	15	6	.194
vs. COL	4.19	19.1	7	4	.200
vs. STL	3.27	11.0	5	5	.268
vs. MIA	4.22	10.2	10	4	.268
vs. CHC	8.10	10.0	9	6	.302
vs. MIL	6.30	10.0	7	7	.333
vs. NYM	1.29	7.0	6	3	.130
vs. SD	1.29	7.0	6	3	.143
vs. HOU	4.50	6.0	4	0	.292
vs. TB	7.50	6.0	3	2	.333
vs. LAD	1.59	5.2	4	4	.118
vs. PIT	0.00	5.2	6	1	.200
vs. BAL	3.38	5.1	3	4	.263
vs. LAA	10.13	5.1	4	1	.423
vs. SEA	3.38	5.1	2	2	.348
vs. CLE	9.00	5.0	5	4	.381
vs. OAK	3.60	5.0	3	1	.278
vs. WSH	12.60	5.0	4	3	.286
vs. CHW	16.62	4.1	5	3	.455
vs. TEX	2.08	4.1	3	3	.143
vs. BOS	13.50	4.0	2	4	.412

🏟️This Season at Each Ballpark

Ballpark	ERA	IP	K	BB	Opp AVG
Total	4.94	162.0	113	70	.268
Chase Field	5.82	68.0	57	30	.283
Coors Field	1.88	14.1	5	1	.160
AT&T Park	1.29	14.0	11	6	.130
PETCO Park	1.29	7.0	6	3	.143
Busch Stadium II	4.50	6.0	2	3	.318
Marlins Park	3.00	6.0	1	2	.200
Minute Maid Park	4.50	6.0	4	0	.292
Tropicana Field	7.50	6.0	3	2	.333
PNC Park	0.00	5.2	6	1	.200
Camden Yards	3.38	5.1	3	4	.263
Safeco Field	3.38	5.1	2	2	.348
Progressive Field	9.00	5.0	5	4	.381
Wrigley Field	12.46	4.1	5	3	.381
Fenway Park	13.50	4.0	2	4	.412

📅By Month & Recent Form

Split	ERA	IP	K	BB	Opp AVG
Last 7 Days	3.38	5.1	2	1	.211
Last 15 Days	4.50	10.0	11	3	.275
Last 30 Days	3.98	20.1	18	6	.256
April	9.20	14.2	9	12	.350
May	3.49	38.2	24	10	.236
June	7.31	28.1	14	11	.319
July	1.95	27.2	24	9	.238
August	5.85	32.1	24	22	.252
September	3.98	20.1	18	6	.256

🎯Pitch Arsenal (2026)

Type	Pitches	Usage%	Zone%	Chase%	Whiff%	BA	wOBA	xwOBA
Changeup	705	27.8%	26.4%	56.9%	28.6%	.231	.261	.336
4-Seam Fastball	695	27.4%	44.2%	31.4%	13.7%	.302	.384	.399
Cutter	358	14.1%	44.4%	29.0%	11.1%	.287	.369	.376
Curveball	289	11.4%	38.4%	42.9%	22.0%	.200	.219	.296
Slider	259	10.2%	32.8%	38.5%	30.3%	.292	.264	.288
Sinker	230	9.1%	43.0%	27.0%	9.0%	.317	.396	.380

🌀Pitch Movement (2026)

Type	#	Velo	Spin	IVB	H-Break	Ext
Changeup	532	88.5	2,167	-0.4"	+1.2"	6.1
4-Seam Fastball	509	92.2	2,364	+13.9"	+0.8"	6.1
Cutter	241	91.0	2,357	+11.6"	+0.3"	6.1
Slider	198	86.2	2,320	+3.2"	-0.2"	6.2
Curveball	195	82.5	2,563	-9.1"	-0.6"	6.1
Sinker	141	92.5	2,244	+6.1"	+1.4"	6.2

IVB = induced vertical break (gravity removed) · H-Break = horizontal movement · Ext = release extension in feet.

📋Recent Game Log

	Date	Opp	Score	IP	H	ER	BB	K	Outs	ERA	PC	Dec
W	Wednesday, September 23, 2026	COL	5-3	5.1	4	2	1	2	16	4.94	78	W
L	Wednesday, September 16, 2026	MIA	4-3	4.2	7	3	2	9	14	5.00	91	L
W	Friday, September 11, 2026	TEX	1-9	4.1	2	1	3	3	13	4.97	80	—
L	Friday, September 4, 2026	HOU	1-3	6.0	7	3	0	4	18	5.06	94	L
W	Saturday, August 29, 2026	SF	7-1	7.0	2	0	4	7	21	5.08	100	W
L	Monday, August 24, 2026	CHC	7-0	5.2	5	3	3	4	17	5.35	99	L
L	Tuesday, August 18, 2026	BOS	4-9	4.0	7	6	4	2	12	5.37	86	L
L	Wednesday, August 12, 2026	COL	6-4	5.0	6	6	3	2	15	5.11	71	L
W	Friday, August 7, 2026	LAD	3-4	5.2	2	1	4	4	17	4.88	80	—
L	Sunday, August 2, 2026	CLE	0-5	5.0	8	5	4	5	15	5.04	96	L

👥Team — Arizona Diamondbacks

Player	Pos	Key Stat
LuJames Groover	1B	.167 AVG
Tyler Locklear	1B	.278 AVG
Pavin Smith	1B	.183 AVG
Tim Tawa	1B	.240 AVG
Ildemaro Vargas	1B	4.91 ERA
Ketel Marte	2B	.249 AVG
Nolan Arenado	3B	.255 AVG
James McCann	C	11.25 ERA
Gabriel Moreno	C	.311 AVG
Jordan Lawlar	CF	.258 AVG
Ryan Waldschmidt	CF	.256 AVG
Adrian Del Castillo	DH	5.40 ERA
Jose Fernandez	DH	.255 AVG
Jesus Sanchez	DH	.254 AVG
Luken Baker	First Baseman	.200 AVG
Lourdes Gurriel Jr.	LF	.210 AVG
Max Kepler	LF	.205 AVG
Lars Nootbaar	LF	.239 AVG
Tommy Troy	LF	.217 AVG
Corbin Carroll	RF	.239 AVG
Juan Burgos	RP	2.08 ERA
Gerardo Carrillo	RP	4.15 ERA
Taylor Clarke	RP	2.96 ERA
Brandyn Garcia	RP	1.93 ERA
Kevin Ginkel	RP	4.12 ERA
Drey Jameson	RP	5.12 ERA
Derek Law	RP	1.00 ERA
Jonathan Loaisiga	RP	2.42 ERA
Justin Martinez	RP	2.03 ERA
Juan Morillo	RP	2.24 ERA
Dennis Santana	RP	5.56 ERA
Kade Strowd	RP	3.38 ERA
Ryan Thompson	RP	4.43 ERA
Mitch Bratt	SP	4.70 ERA
Corbin Burnes	SP	7.84 ERA
Jose Cabrera	SP	5.72 ERA
Kohl Drake	SP	6.53 ERA
Zac Gallen	SP	6.07 ERA
Zack Littell	SP	5.21 ERA
Ryne Nelson	SP	4.95 ERA
Brandon Pfaadt	SP	3.77 ERA
Dylan Ray	SP	—
Eduardo Rodriguez	SP	2.89 ERA
Michael Soroka	SP	3.41 ERA
Blake Walston	SP	3.00 ERA
Geraldo Perdomo	SS	.262 AVG

See the Full Analysis

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