Players · K · Pitcher · 2025 regular season

Casey Kelly

Arizona Diamondbacks National League West

Age: 36
B/T: R/R
Height: 6' 3"
Weight: 215 lb
Number: #60

Born: October 4, 1989 in Sarasota, FL, United States
MLB debut: August 27, 2012
Drafted: 2008, round 1
High school: Sarasota

dbWAR: .3
IP: 1.2
ERA: 0.00
FIP: 4.94
K/9: 0.0
FIP−: 119

Casey Kelly was a relief pitcher for the Arizona Diamondbacks. In 2025 he struck out 0 batters over 1.2 innings across 2 appearances, going 0-0. His ERA of 0.00 was 100.0% lower than the league average of 4.16. Stripping out defence, his 4.94 FIP suggests that his ERA had some help behind him. He missed bats on 20.0% of swings (8.3% of every pitch he threw), walked 16.7% of the batters he faced and struck out 0.0%. His -0.0 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2025 regular season.

FIP4.94

K/90.0

WHIP1.20

WAR-.0

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only.


2025	AZ	2	0	1.2	0	0	0	1	0	0	1	0.00	4.94	1.20	0.0	5.4	0	119	-0.0
2024	CIN	2	0	5.1	0	0	1	5	3	4	1	5.06	4.67	1.13	6.8	1.7	124	114	0.0
2018	SF	7	3	23.2	0	3	0	28	8	16	5	3.04	4.22	1.39	6.1	1.9	73	102	0.2
2016	ATL	10	1	21.2	0	3	0	30	14	7	7	5.82	4.35	1.71	2.9	2.9	139	104	0.1
2015	SD	3	2	11.1	0	2	0	19	10	7	3	7.94	4.10	1.94	5.6	2.4	200	104	0.1
2012	SD	6	6	29.0	2	3	0	39	20	26	10	6.21	4.78	1.69	8.1	3.1	155	119	0.0

Batting Regular season

Standard and advanced, by season. Regular-season games only.


2018	SF	4	6	0	3	.000	.000	.000	.000	.000	0.0%	50.0%	.000	-1.5	-120	-0.1
2016	ATL	3	3	0	1	.000	.000	.000	.000	.000	0.0%	33.3%	.000	-0.8	-115	-0.0
2015	SD	2	3	0	0	.000	.000	.000	.000	.000	0.0%	0.0%	.000	-0.8	-125	-0.0
2012	SD	6	12	2	4	.200	.200	.200	.000	.333	0.0%	33.3%	.177	-1.3	3	-0.0

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2025. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	1	1	0	0	0	0	.000	.000	.000	.000	0.0%
vs RHB	5	4	1	0	1	0	.250	.400	.250	.321	0.0%

Pitch sequencing

What Casey Kelly throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

SliderFour-seam

Select a count to see exactly what Casey Kelly throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Four-Seam Fastball	41.7%	10	91.5	2,281	40.0%	0.0%	2	—	—

Casey Kelly's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

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Casey Kelly

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.