Players · S · Pitcher · 2007 regular season

Jae Weong Seo

Tampa Bay Devil Rays American League East

Age: 30
B/T: R/R
Height: 6' 0"
Weight: 225 lb
Number: #40

Born: May 24, 1977 in Gwangju, South Korea
MLB debut: July 21, 2002

dbWAR: .8
IP: 52.0
ERA: 8.13
FIP: 6.07
K/9: 4.8
FIP−: 136

Jae Weong Seo was a starting pitcher for the Tampa Bay Devil Rays. In 2007 he struck out 28 batters over 52.0 innings across 11 appearances, 10 of them starts, going 3-4. His ERA of 8.13 was 81.9% higher than the league average of 4.47 — the worst on his team, and 473rd of 484 among MLB pitchers with 20+ innings. Stripping out defence, his 6.07 FIP suggests he pitched better than his ERA shows. He missed bats on 10.1% of swings (4.5% of every pitch he threw), walked 6.5% of the batters he faced and struck out 11.3%. His -0.4 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, 2007 regular season.

FIP6.07

K/94.8

WHIP1.92

WAR-.4

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only. Seasons on file run 2005–2007; his career began in 2002, and earlier seasons are not in this data yet.


2007	TB	11	10	52.0	3	4	84	47	28	16	8.13	6.07	1.92	4.8	2.8	182	136	-0.4
2006	LAD/TB	36	26	157.0	3	12	197	93	88	56	5.33	5.74	1.61	5.0	3.2	118	127	-0.4
2005	NYM	14	14	90.1	8	2	84	26	59	16	2.59	3.57	1.11	5.9	1.6	60	83	1.8

Batting Regular season

Standard and advanced, by season. Regular-season games only. Seasons on file run 2005–2007; his career began in 2002, and earlier seasons are not in this data yet.

																					Trend
2006	LAD/TB	14	22	2	0	0	0	1	6	.105	.150	.105	.000	.154	4.5%	27.3%	.126	-3.9	-40	-0.1
2005	NYM	14	34	3	0	4	0	3	11	.103	.188	.138	.034	.167	8.8%	32.4%	.162	-4.7	-15	-0.0

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2007. 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	123	112	42	5	6	18	.375	.418	.589	.439	14.6%
vs RHB	125	114	42	6	10	10	.368	.424	.623	.452	8.0%

Not in the 2007 data: pitch types, recorded in every park from 2008. The play-by-play goes back to 2005, but the measurements on each pitch and batted ball arrived later, so the panels built from them are left off this season.

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Jae Weong Seo

Similar players

Nearest 2007 seasons by command, run prevention and role, on rate statistics rather than totals.

Ryan FeierabendSEA

ERA: 8.03
FIP: 6.42
SO: 27
WAR: -0.6

Sidney PonsonMIN

ERA: 6.93
FIP: 6.03
SO: 23
WAR: -0.2

Mike MarothSTL

ERA: 6.89
FIP: 6.69
SO: 51
WAR: -1.7

Jason SimontacchiWSH

ERA: 6.37
FIP: 5.55
SO: 42
WAR: -0.1

Comparable

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.