Players · D · Pitcher · 2008 regular season

Joselo Diaz

Age: 28
B/T: R/R
Height: 6' 0"
Weight: 230 lb

Born: April 13, 1980 in San Pedro de Macoris, Dominican Republic
MLB debut: September 6, 2006

dbWAR: -.4
IP: 1.0
ERA: 0.00
FIP: 5.13
K/9: 18.0
FIP−: 119

Joselo Diaz was a relief pitcher for the Texas Rangers. In 2008 he struck out 2 batters over 1.0 inning across 1 appearance, going 0-0. His ERA of 0.00 was 100.0% lower than the league average of 4.32. Stripping out defence, his 5.13 FIP suggests that his ERA had some help behind him. He missed bats on 26.7% of swings (13.3% of every pitch he threw), walked 16.7% of the batters he faced and struck out 33.3%. 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, 2008 regular season.

FIP5.13

K/918.0

WHIP2.00

WAR-.0

WAR by season

Pitching Regular season

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

																				Trend
2008	TEX	1	0	1.0	0	0	0	1	0	2	1	0.00	5.13	2.00	18.0	9.0	0	119	-0.0
2006	KC	4	0	6.2	0	0	0	10	8	3	8	10.80	10.20	2.70	4.0	10.8	239	225	-0.4

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2008. 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	1	1	0	0	0	1	.000	.000	.000	.000	100.0%
vs RHB	5	2	1	0	1	1	.500	.600	.500	.476	20.0%

Pitch sequencing

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

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Four-seamSlider

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Pitch arsenal

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

Season


Four-Seam Fastball	70.0%	21	94.1	2,121	52.4%	36.4%	2	—	—

Joselo Diaz'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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Joselo Diaz

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.