Players · R · Pitcher · 2021

Zac Rosscup

Age: 33
B/T: R/L
Height: 6' 2"
Weight: 220 lb
Number: #59

Born: June 9, 1988 in Clackamas, OR, United States
MLB debut: September 3, 2013

dbWAR: -.0
IP: 3.0
ERA: 3.00
FIP: 6.84
K/9: 12.0
FIP−: 160

Zac Rosscup was a relief pitcher for the Colorado Rockies. In 2021 he struck out 4 batters over 3.0 innings across 4 appearances, going 0-0. His ERA of 3.00 was 29.7% lower than the league average of 4.27. Stripping out defence, his 6.84 FIP suggests that his ERA had some help behind him. He missed bats on 32.0% of swings (16.7% of every pitch he threw), walked 7.7% of the batters he faced and struck out 30.8%. 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, 2021.

FIP6.84

K/912.0

WHIP1.33

WAR-.1

WAR by season

Pitching

Standard and advanced, by season.


2021	COL	4	3.0	0	0	3	1	4	1	3.00	6.84	1.33	12.0	3.0	70	160	-0.1
2019	SEA/LAD/TOR	28	18.0	2	0	22	10	26	19	5.00	4.94	2.28	13.0	9.5	111	110	0.0
2018	LAD	17	11.1	0	1	9	6	20	4	4.76	4.13	1.15	15.9	3.2	115	100	0.1
2017	COL/CHC	10	7.2	0	0	9	4	10	0	4.70	3.94	1.17	11.7	0.0	108	90	0.1
2015	CHC	33	26.2	2	1	26	13	29	13	4.39	4.86	1.46	9.8	4.4	111	123	-0.1

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	5	4	1	1	0	2	.250	.200	1.000	.397	40.0%
vs RHB	8	6	2	0	1	2	.333	.500	.333	.404	25.0%

Pitch sequencing

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

ShowBatter

SliderCurveballFour-seam

Select a count to see exactly what Zac Rosscup throws in it.

Pitch arsenal

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

Season


Curveball	35.4%	17	81.2	2,510	64.7%	16.7%	3	—	—
Slider	33.3%	16	85.8	2,368	31.3%	57.1%	3	—	—
Four-Seam Fastball	31.3%	15	90.7	1,865	46.7%	33.3%	4	—	—

Zac Rosscup'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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Zac Rosscup

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.