Players · M · Pitcher · 2021

Humberto Mejía

Arizona Diamondbacks National League West

Age: 24
B/T: R/R
Height: 6' 4"
Weight: 244 lb
Number: #62

Born: March 3, 1997 in Panama City, Panama
MLB debut: August 7, 2020

dbWAR: -.2
IP: 22.1
ERA: 7.25
FIP: 5.50
K/9: 8.1
FIP−: 129

Humberto Mejía was a starting pitcher for the Arizona Diamondbacks. In 2021 he struck out 20 batters over 22.1 innings across 5 appearances, 5 of them starts, going 0-3. His ERA of 7.25 was 70.0% higher than the league average of 4.27 — 20th of 22 on his team, and 545th of 567 among MLB pitchers with 20+ innings. Stripping out defence, his 5.50 FIP suggests he pitched better than his ERA shows. He missed bats on 21.6% of swings (10.9% of every pitch he threw), walked 8.6% of the batters he faced and struck out 19.0%. 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, 2021.

FIP5.50

K/98.1

WHIP1.84

WAR-.0

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2021	AZ	5	5	22.1	0	3	0	32	18	20	9	7.25	5.50	1.84	8.1	3.6	170	129	-0.0
2020	MIA	3	3	10.0	0	2	0	13	6	11	6	5.40	6.99	1.90	9.9	5.4	121	157	-0.2

Batting

Standard and advanced, by season.

																					Trend
2021	AZ	5	8	1	0	0	0	0	2	.143	.143	.286	.143	.200	0.0%	25.0%	.179	-0.9	4	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	48	44	16	3	3	11	.364	.396	.818	.492	22.9%
vs RHB	57	50	16	2	6	9	.320	.393	.600	.415	15.8%

Spray chart

Where every ball he put in play landed, 2021.

Loading 6 batted balls…

Hot and cold zones

Batting average by pitch location, 2021.

Below averageLeague averageAbove average

Batting average by location of the pitch that ended each plate appearance, catcher's view. The bordered square is the strike zone; the outer band is chase territory. Cells with fewer than 8 at-bats are left grey rather than shown as signal. League average on the same attribution is .243.

Pitch sequencing

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

ShowBatter

Four-seamSinkerSliderChangeupCurveball

Select a count to see exactly what Humberto Mejía throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	43.0%	181	91.9	2,166	51.9%	16.5%	40	.450	1.572
Sinker	20.2%	85	91.9	2,184	41.2%	16.2%	16	.188	.500
Slider	17.1%	72	82.1	2,325	43.1%	26.5%	18	.278	.760
Changeup	15.9%	67	85.0	1,829	40.3%	34.4%	16	.313	.857
Curveball	3.8%	16	76.2	2,534	37.5%	42.9%	4	—	—

Humberto Mejía'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 Humberto Mejía beside up to three others.

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Humberto Mejía

Similar players

Nearest 2021 seasons by command, run prevention and role, on rate statistics rather than totals.

Jake ArrietaCHC

ERA: 7.39
FIP: 6.17
SO: 83
WAR: -0.9

Very close

Reid DetmersLAA

ERA: 7.40
FIP: 6.36
SO: 19
WAR: -0.2

Zac LowtherBAL

ERA: 6.67
FIP: 5.50
SO: 30
WAR: -0.1

Justus SheffieldSEA

ERA: 6.83
FIP: 5.66
SO: 63
WAR: -0.5

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.