Players · R · Pitcher · 2010 regular season

Leo Rosales

Arizona Diamondbacks National League West

Age: 29
B/T: R/R
Height: 6' 1"
Weight: 205 lb
Number: #47

Born: May 28, 1981 in Los Angeles, CA, United States
MLB debut: June 15, 2008

dbWAR: .6
IP: 16.1
ERA: 7.16
FIP: 4.85
K/9: 6.6
FIP−: 119

Leo Rosales was a relief pitcher for the Arizona Diamondbacks. In 2010 he struck out 12 batters over 16.1 innings across 16 appearances, going 2-0. His ERA of 7.16 was 75.6% higher than the league average of 4.08. Stripping out defence, his 4.85 FIP suggests he pitched better than his ERA shows. He missed bats on 21.0% of swings (9.8% of every pitch he threw), walked 11.3% of the batters he faced and struck out 15.0%. His -0.0 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, 2010 regular season.

FIP4.85

K/96.6

WHIP2.08

WAR-.0

WAR by season

Pitching Regular season

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


2010	AZ	16	16.1	2	0	25	13	12	9	7.16	4.85	2.08	6.6	5.0	176	119	-0.0
2009	AZ	33	45.1	2	1	40	24	31	12	4.76	3.96	1.15	6.2	2.4	110	92	0.5
2008	AZ	27	30.0	1	1	32	14	18	15	4.20	4.40	1.57	5.4	4.5	97	102	0.2

Batting Regular season

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

																					Trend
2010	AZ	2	2	0	0	0	0	0	0	.000	.000	.000	.000	.000	0.0%	0.0%	.000	-0.5	-123	-0.0
2009	AZ	2	3	0	0	0	0	0	2	.000	.000	.000	.000	.000	0.0%	66.7%	.000	-0.8	-119	-0.0

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2010. 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	32	28	10	1	3	7	.357	.406	.607	.435	21.9%
vs RHB	48	41	15	1	6	5	.366	.438	.512	.421	10.4%

Spray chart

Where every ball he put in play landed, 2010.

Loading 2 batted balls…

Hot and cold zones

Batting average by pitch location, 2010.

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 .257.

Pitch sequencing

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

ShowBatter

Four-seamChangeupSliderSinker

Select a count to see exactly what Leo Rosales throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	49.5%	151	90.0	2,181	43.0%	18.5%	28	.286	.757
Changeup	32.8%	100	82.1	1,374	46.0%	25.0%	29	.379	1.096
Slider	10.5%	32	86.4	1,312	40.6%	25.0%	8	—	—
Sinker	5.6%	17	89.0	2,526	47.1%	0.0%	2	—	—

Leo Rosales'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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Leo Rosales

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.