Players · M · Pitcher · 2021

Keury Mella

Arizona Diamondbacks National League West

Age: 28
B/T: R/R
Height: 6' 2"
Weight: 234 lb

Born: August 2, 1993 in Bonao, Dominican Republic
MLB debut: September 20, 2017

dbWAR: -.7
IP: 1.2
ERA: 32.40
FIP: 19.97
K/9: 10.8
FIP−: 468

Keury Mella was a relief pitcher for the Arizona Diamondbacks. In 2021 he struck out 2 batters over 1.2 innings across 2 appearances, going 0-0. His ERA of 32.40 was 659.5% higher than the league average of 4.27. Stripping out defence, his 19.97 FIP suggests he pitched better than his ERA shows. He missed bats on 18.2% of swings (8.0% of every pitch he threw), walked 13.3% of the batters he faced and struck out 13.3%. His -0.3 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, 2021.

FIP19.97

K/910.8

WHIP6.00

WAR-.3

WAR by season

Pitching

Standard and advanced, by season.


2021	AZ	2	1.2	0	8	6	2	2	32.40	19.97	6.00	10.8	10.8	760	468	-0.3
2020	AZ	11	10.0	2	10	2	10	3	1.80	3.39	1.30	9.0	2.7	40	76	0.2
2019	CIN	2	3.2	0	5	3	4	2	7.36	2.67	1.91	9.8	4.9	163	59	0.1
2018	CIN	4	9.1	0	13	9	8	8	8.68	9.91	2.25	7.7	7.7	209	239	-0.6
2017	CIN	2	4.0	0	5	3	1	2	6.75	7.41	1.75	2.3	4.5	155	170	-0.1

Batting

Standard and advanced, by season.

																					Trend
2019	CIN	1	1	0	0	0	0	0	1	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.3	-118	-0.0
2018	CIN	1	2	0	0	0	0	0	2	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.5	-116	-0.0

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2021. 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	9	7	5	2	2	1	.714	.778	1.571	.895	11.1%
vs RHB	6	6	3	0	0	1	.500	.500	.667	.501	16.7%

Pitch sequencing

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

ShowBatter

SinkerFour-seamSliderChangeup

Select a count to see exactly what Keury Mella throws in it.

Pitch arsenal

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

Season


Sinker	46.0%	23	94.0	2,099	30.4%	9.1%	7	—	—
Four-Seam Fastball	30.0%	15	94.3	1,993	40.0%	28.6%	2	—	—

Keury Mella'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.

Head to head

Put Keury Mella beside up to three others.

Compare — add up to 3 more players

Keury Mella

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.