Players · A · Pitcher · 2015 regular season

Jeremy Affeldt

San Francisco Giants National League West

Age: 36
B/T: L/L
Height: 6' 4"
Weight: 225 lb
Number: #41

Born: June 6, 1979 in Phoenix, AZ, United States
MLB debut: April 6, 2002

dbWAR: 4.9
IP: 35.1
ERA: 5.86
FIP: 5.51
K/9: 5.3
FIP−: 139

Jeremy Affeldt was a relief pitcher for the San Francisco Giants. In 2015 he struck out 21 batters over 35.1 innings across 52 appearances, going 2-2. His ERA of 5.86 was 47.9% higher than the league average of 3.96 — the worst on his team, and 463rd of 513 among MLB pitchers with 20+ innings. Stripping out defence, his 5.51 FIP suggests he pitched better than his ERA shows. He missed bats on 15.0% of swings (6.4% of every pitch he threw), walked 8.6% of the batters he faced and struck out 12.9%. His -0.5 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, 2015 regular season.

FIP5.51

K/95.3

WHIP1.61

WAR-.5

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only — postseason games are listed separately below. Seasons on file run 2005–2015; his career began in 2002, and earlier seasons are not in this data yet.


2015	SF	52	0	35.1	2	2	0	43	23	21	14	5.86	5.51	1.61	5.3	3.6	148	139	-0.5
2014	SF	62	0	55.1	4	2	0	47	14	41	14	2.28	2.86	1.10	6.7	2.3	61	76	0.9
2013	SF	39	0	33.2	1	5	0	27	14	21	17	3.74	4.44	1.31	5.6	4.5	97	115	-0.1
2012	SF	67	0	63.1	1	2	3	57	19	57	23	2.70	2.73	1.26	8.1	3.3	67	68	1.2
2011	SF	67	0	61.2	3	2	3	47	18	54	24	2.63	3.69	1.15	7.9	3.5	67	94	0.4
2010	SF	53	0	50.0	4	3	4	56	23	44	24	4.14	3.98	1.60	7.9	4.3	101	98	0.3
2009	SF	74	0	62.1	2	2	0	42	12	55	31	1.73	3.59	1.17	7.9	4.5	40	83	0.9
2008	CIN	74	0	78.1	1	1	0	78	29	80	25	3.33	3.66	1.31	9.2	2.9	77	85	1.1
2007	COL	75	0	59.0	4	3	0	47	23	46	33	3.51	4.17	1.36	7.0	5.0	78	93	0.6
2006	COL/KC	54	9	97.1	8	8	1	102	67	48	55	6.20	5.65	1.61	4.4	5.1	137	125	-0.4
2005	KC	49	0	49.2	0	2	0	56	29	39	29	5.26	3.99	1.71	7.1	5.3	122	93	0.5

Batting Regular season


2015	SF	2	2	0	0	2	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.5	-129	-0.0
2012	SF	1	1	0	0	0	.000	.000	.000	.000	.000	0.0%	0.0%	.000	-0.2	-129	-0.0
2011	SF	2	2	0	1	1	.000	.500	.000	.000	—	50.0%	50.0%	.354	+0.1	133	0.0
2010	SF	1	1	0	0	1	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.3	-127	-0.0
2009	SF	2	2	1	0	0	.500	.500	.500	.000	.500	0.0%	0.0%	.451	+0.2	177	0.0
2008	CIN	1	1	0	0	0	.000	.000	.000	.000	.000	0.0%	0.0%	.000	-0.3	-125	-0.0
2006	KC/COL	3	3	0	0	1	.000	.000	.000	.000	.000	0.0%	33.3%	.000	-0.8	-120	-0.0

Separate from the regular season

Postseason Postseason

Wild Card through World Series. These games are counted on their own: none of them are in the regular-season tables, career totals, league context, leaderboards or dbWAR on this page.

Postseason pitching

Postseason Jeremy Affeldt's postseason pitching, by October and round. Not part of any regular-season figure on this page.
Season	Team	Round	G	IP	W	H	ER	HR	BB	SO	ERA	WHIP	K/9
2014 Post	SF	Postseason total	11	11.2	2	5	0	0	2	2	0.00	0.60	1.5
		NLDS	3	1.2	0	1	0	0	0	1	0.00	0.60	5.4
		NLCS	4	4.2	1	1	0	0	2	1	0.00	0.64	1.9
		World Series	4	5.1	1	3	0	0	0	0	0.00	0.56	0.0
2012 Post	SF	Postseason total	10	10.1	0	5	0	0	3	10	0.00	0.77	8.7
		NLDS	3	3.2	0	3	0	0	1	2	0.00	1.09	4.9
		NLCS	5	4.2	0	2	0	0	1	4	0.00	0.64	7.7
		World Series	2	2.0	0	0	0	0	1	4	0.00	0.50	18.0
2010 Post	SF	Postseason total	5	4.0	0	1	2	0	2	4	4.50	0.75	9.0
		NLCS	3	2.2	0	0	1	0	1	4	3.38	0.38	13.5
		World Series	2	1.1	0	1	1	0	1	0	6.75	1.50	0.0
2007 Post	COL	Postseason total	7	5.1	0	3	1	1	1	4	1.69	0.75	6.8
		NLDS	1	1.0	0	1	1	1	0	2	9.00	1.00	18.0
		NLCS	2	1.1	0	0	0	0	0	0	0.00	0.00	0.0
		World Series	4	3.0	0	2	0	0	1	2	0.00	1.00	6.0
2005–2015		Postseason total · 4 Octobers	33	31.1	2	14	3	1	8	20	0.86	0.70	5.7

Box-score and rate statistics only. wOBA, wRC+, FIP and dbWAR are measured against a full league season, and a postseason is a few teams playing each other for a month, so they are not computed for October.

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2015. 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	73	67	19	2	5	12	.284	.342	.418	.337	16.4%
vs RHB	90	80	24	4	9	9	.300	.378	.487	.373	10.0%

Hot and cold zones

Batting average by pitch location, 2015.

Pitch sequencing

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

ShowBatter

SinkerCurveballChangeupIN

Select a count to see exactly what Jeremy Affeldt throws in it.

Pitch arsenal

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

Season


Sinker	66.6%	375	90.4	2,345	40.8%	6.5%	104	.356	.975
Curveball	23.4%	132	74.5	1,694	37.1%	35.4%	31	.129	.414
Changeup	8.5%	48	86.1	1,799	35.4%	36.4%	12	—	—

Jeremy Affeldt'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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Jeremy Affeldt

Similar players

Nearest 2015 seasons by command, run prevention and role, on rate statistics rather than totals.

JC RamírezAZ

ERA: 5.32
FIP: 4.95
SO: 16
WAR: -0.1

Samuel DedunoHOU

ERA: 6.86
FIP: 5.09
SO: 17
WAR: -0.1

Mayckol GuaipeSEA

ERA: 5.40
FIP: 5.72
SO: 22
WAR: -0.4

Bud NorrisSD

ERA: 6.72
FIP: 5.04
SO: 71
WAR: -0.5

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.