Players · C · Pitcher · 2019

Wei-Yin Chen

Age: 34
B/T: R/L
Height: 6' 0"
Weight: 200 lb
Number: #16

Born: July 21, 1985 in Kaohsiung City, Taiwan
MLB debut: April 10, 2012

dbWAR: 3.6
IP: 68.1
ERA: 6.59
FIP: 5.23
K/9: 8.3
FIP−: 116

Wei-Yin Chen was a relief pitcher for the Miami Marlins. In 2019 he struck out 63 batters over 68.1 innings across 45 appearances, going 0-1. His ERA of 6.59 was 46.2% higher than the league average of 4.51 — the second worst on his team, and 490th of 545 among MLB pitchers with 20+ innings. Stripping out defence, his 5.23 FIP suggests he pitched better than his ERA shows. He missed bats on 20.3% of swings (10.3% of every pitch he threw), walked 5.9% of the batters he faced and struck out 20.5%. 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, 2019.

FIP5.23

K/98.3

WHIP1.54

WAR-.1

WAR by season

Pitching

Standard and advanced, by season.


2019	MIA	45	0	68.1	0	1	87	50	63	18	6.59	5.23	1.54	8.3	2.4	146	116	-0.1
2018	MIA	26	26	133.1	6	12	131	71	111	47	4.79	4.43	1.33	7.5	3.2	115	107	0.9
2017	MIA	9	5	33.0	2	1	25	14	25	9	3.82	3.73	1.03	6.8	2.5	88	86	0.5
2016	MIA	22	22	123.1	5	5	134	68	100	24	4.96	4.50	1.28	7.3	1.8	118	107	0.9
2015	BAL	31	31	191.1	11	8	192	71	153	41	3.34	4.16	1.22	7.2	1.9	84	105	2.0

Batting

Standard and advanced, by season.


2019	MIA	5	5	0	0	4	.000	.000	.000	.000	.000	0.0%	80.0%	.000	-1.4	-116	-0.1
2018	MIA	26	42	6	2	18	.150	.150	.175	.025	.273	0.0%	42.9%	.142	-6.0	-24	0.1
2017	MIA	4	8	1	0	3	.125	.125	.125	.000	.200	0.0%	37.5%	.109	-1.4	-49	-0.0
2016	MIA	21	49	0	0	18	.000	.000	.000	.000	.000	0.0%	36.7%	.000	-12.5	-123	-0.6

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2019. 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	112	103	31	7	5	22	.301	.348	.563	.379	19.6%
vs RHB	195	177	56	8	13	41	.316	.368	.554	.382	21.0%

Spray chart

Where every ball he put in play landed, 2019.

Loading 1 batted balls…

Hot and cold zones

Batting average by pitch location, 2019.

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 .252.

Pitch sequencing

What Wei-Yin Chen throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

Four-seamSliderCurveballChangeupSinker

Select a count to see exactly what Wei-Yin Chen throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	48.1%	554	91.4	2,138	51.6%	14.2%	127	.315	.975
Slider	22.7%	261	85.8	2,291	45.6%	25.6%	86	.337	.987
Curveball	22.4%	258	74.1	2,299	45.0%	30.1%	50	.240	.564
Changeup	3.8%	44	84.0	1,371	34.1%	13.6%	13	—	—
Sinker	3.0%	34	89.7	2,058	41.2%	25.0%	4	—	—

Wei-Yin Chen'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 Wei-Yin Chen beside up to three others.

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Wei-Yin Chen

Similar players

Nearest 2019 seasons by command, run prevention and role, on rate statistics rather than totals.

Matt GraceWSH

ERA: 6.36
FIP: 5.55
SO: 35
WAR: -0.2

Very close

Phil MatonSD

ERA: 6.14
FIP: 5.04
SO: 33
WAR: -0.0

Very close

Cy SneedHOU

ERA: 5.48
FIP: 4.81
SO: 23
WAR: 0.1

Wade LeBlancSEA

ERA: 5.71
FIP: 5.49
SO: 92
WAR: -0.4

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.