Players · R · Pitcher · 2020

Randy Rosario

Kansas City Royals American League Central

Age: 26
B/T: L/L
Height: 6' 1"
Weight: 210 lb

Born: May 18, 1994 in Nagua, Dominican Republic
MLB debut: June 2, 2017

dbWAR: .0
IP: 3.1
ERA: 8.10
FIP: 8.29
K/9: 10.8
FIP−: 186

Randy Rosario was a relief pitcher for the Kansas City Royals. In 2020 he struck out 4 batters over 3.1 innings across 4 appearances, going 0-1. His ERA of 8.10 was 81.9% higher than the league average of 4.45. Stripping out defence, his 8.29 FIP suggests the ERA was no fluke. He missed bats on 18.2% of swings (7.1% of every pitch he threw), walked 14.3% of the batters he faced and struck out 19.0%. 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, 2020.

FIP8.29

K/910.8

WHIP3.00

WAR-.1

WAR by season

Pitching

Standard and advanced, by season.


2020	KC	4	3.1	0	1	0	7	3	4	3	8.10	8.29	3.00	10.8	8.1	182	186	-0.1
2019	CHC/KC	19	14.1	2	0	0	15	7	13	5	4.40	4.26	1.40	8.2	3.1	98	95	0.1
2018	CHC	44	46.2	4	0	1	47	19	30	22	3.66	4.68	1.48	5.8	4.2	88	113	0.0
2017	MIN	2	2.1	0	0	0	7	8	2	0	30.86	8.30	3.00	7.7	0.0	708	190	-0.1

Batting

Standard and advanced, by season.

																					Trend
2019	CHC	1	1	0	0	0	0	0	0	.000	.000	.000	.000	.000	0.0%	0.0%	.000	-0.3	-121	-0.0
2018	CHC	2	2	1	0	1	0	1	0	1.000	1.000	1.000	.000	1.000	50.0%	0.0%	.792	+0.8	419	0.1

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2020. 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	8	5	2	0	2	1	.400	.500	.400	.401	12.5%
vs RHB	13	11	5	1	1	3	.455	.538	.818	.564	23.1%

Pitch sequencing

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

ShowBatter

SliderSinkerFour-seamChangeup

Select a count to see exactly what Randy Rosario throws in it.

Pitch arsenal

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

Season


Slider	42.4%	36	85.1	2,164	47.2%	25.0%	7	—	—
Sinker	40.0%	34	91.7	1,797	38.2%	7.7%	9	—	—
Four-Seam Fastball	14.1%	12	92.2	1,868	41.7%	0.0%	0	—	—

Randy Rosario'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

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Randy Rosario

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.