Players · M · Pitcher · 2023 regular season

J.C. Mejía

Milwaukee Brewers National League Central

Age: 27
B/T: R/R
Height: 6' 6"
Weight: 250 lb
Number: #36

Born: August 26, 1996 in Gaspar Hernandez, Dominican Republic
MLB debut: May 21, 2021

dbWAR: -.7
IP: 11.1
ERA: 5.56
FIP: 4.31
K/9: 10.3
FIP−: 100

J.C. Mejía was a relief pitcher for the Milwaukee Brewers. In 2023 he struck out 13 batters over 11.1 innings across 9 appearances, going 1-0. His ERA of 5.56 was 28.3% higher than the league average of 4.33. Stripping out defence, his 4.31 FIP suggests he pitched better than his ERA shows. He missed bats on 26.8% of swings (12.1% of every pitch he threw), walked 6.0% of the batters he faced and struck out 26.0%. His 0.1 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, 2023 regular season.

FIP4.31

K/910.3

WHIP1.59

WAR.1

WAR by season

Pitching Regular season

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


2023	MIL	9	0	11.1	1	0	15	7	13	3	5.56	4.31	1.59	10.3	2.4	128	100	0.1
2022	MIL	2	0	2.1	0	0	5	6	1	5	23.14	8.68	4.29	3.9	19.3	583	219	-0.1
2021	CLE	17	11	52.1	1	7	60	48	47	24	8.25	6.15	1.61	8.1	4.1	194	144	-0.6

Batting Regular season

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

																					Trend
2021	CLE	1	1	0	0	0	0	0	1	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.3	-122	-0.0	—

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2023. 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	23	21	7	1	1	6	.333	.391	.476	.380	26.1%
vs RHB	27	25	8	1	2	7	.320	.370	.480	.369	25.9%

Pitch sequencing

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

ShowBatter

SinkerSliderFour-seam

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

Pitch arsenal

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

Season


Sinker	54.2%	116	95.8	2,093	52.6%	20.3%	29	.414	1.072
Slider	43.0%	92	85.3	2,537	46.7%	38.7%	15	.133	.435

J.C. 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.

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J.C. Mejía

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.