Players · D · Pitcher · 2021

Yennsy Díaz

Age: 25
B/T: R/R
Height: 6' 1"
Weight: 210 lb

Born: November 15, 1996 in Azua, Dominican Republic
MLB debut: August 4, 2019

dbWAR: -.4
IP: 25.0
ERA: 5.40
FIP: 5.65
K/9: 7.6
FIP−: 132

Yennsy Díaz was a relief pitcher for the New York Mets. In 2021 he struck out 21 batters over 25.0 innings across 20 appearances, going 0-2. His ERA of 5.40 was 26.6% higher than the league average of 4.27 — 15th of 18 on his team, and 439th of 567 among MLB pitchers with 20+ innings. Stripping out defence, his 5.65 FIP suggests the ERA was no fluke. He missed bats on 23.1% of swings (10.2% of every pitch he threw), walked 10.7% of the batters he faced and struck out 18.8%. 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.

FIP5.65

K/97.6

WHIP1.48

WAR-.3

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2021	NYM	20	0	25.0	0	2	0	25	15	21	12	5.40	5.65	1.48	7.6	4.3	127	132	-0.3
2019	TOR	1	0	0.2	0	0	0	1	2	0	4	27.00	21.21	7.50	0.0	54.0	599	471	-0.1

Batting

Standard and advanced, by season.

																					Trend
2021	NYM	1	1	0	0	0	0	0	1	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.3	-127	-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	49	45	12	3	4	7	.267	.327	.533	.357	14.3%
vs RHB	64	53	13	2	9	14	.245	.359	.377	.332	21.9%

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 Yennsy Díaz throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

ShowBatter

Four-seamChangeupSlider

Select a count to see exactly what Yennsy Díaz throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	63.8%	287	95.4	1,996	48.4%	25.8%	57	.263	.815
Changeup	28.0%	126	89.9	1,610	34.9%	20.3%	38	.263	.800
Slider	7.6%	34	85.3	2,216	32.4%	8.3%	3	—	—

Yennsy Díaz'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 Yennsy Díaz beside up to three others.

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Yennsy Díaz

Similar players

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

Justin WilsonNYY

ERA: 5.29
FIP: 5.26
SO: 29
WAR: -0.2

Very close

Alex ClaudioLAA

ERA: 5.51
FIP: 5.10
SO: 30
WAR: -0.1

Very close

Nick MearsPIT

ERA: 5.01
FIP: 5.66
SO: 23
WAR: -0.2

Very close

Wade DavisKC

ERA: 6.75
FIP: 5.30
SO: 38
WAR: -0.2

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.