How to read this player page

The big number is his career NUT, his total production against league average, with its letter grade. This season's NUT sits just below it, followed by his season and career lines, recent form over 7, 14 and 30 days, game logs, and percentile ranks against every qualified player. NUT is built on the advanced hitting and pitching stats analysts trust, with defense left out, so the number reflects what the player controls.

Jeremy Affeldt 2026 Season · SF

Jeremy Affeldt is a free agent pitcher. His career NUT is +2.5, #873 of 7,125 pitchers since 1876, and his best season by NUT was 2012 (+0.9). NUT is one number for production against league average: 0.0 is average, and every season is graded against its own league.

Career: 43-46, 3.97 ERA, 720 K in 926.0 IP.

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Jeremy Affeldt Career Stats & NUT | Baseball NUT

Jeremy Affeldt

#41

P · Free agent

Compare

BGood

+2.5Career NUT

+5.5 to Great

Career

3.97ERA1.40WHIP43W720K926.0IP28SV

Career · season grades

L/L · 6' 4", 225 lb · b. Jun 6, 1979 · Phoenix, AZ · Draft 1997 (3rd Rd, #91)

Player Overview

Year by Year


2002	23	KC	+0.1	3	4	4.64	34	7	4	0	1	1	1	353	77.2	85	40	37	3	67	1.57
2003	24	KC	+0.9	7	6	3.93	36	18	5	4	3	0	4	533	126.0	126	55	38	5	98	1.30
2004	25	KC	+0.2	3	4	4.95	38	8	26	13	0	4	17	344	76.1	91	42	32	3	49	1.61
2005	26	KC	+0.2	0	2	5.26	49	0	13	0	12	0	0	232	49.2	56	29	29	0	39	1.71
2006	27	KC	-1.0	4	6	5.91	27	9	3	0	2	0	0	320	70.0	71	46	42	1	28	1.61
2006	27	COL	-0.2	4	2	6.91	27	0	9	1	3	2	3	128	27.1	31	21	13	1	20	1.61
2006	27	TOT	-1.2	8	8	6.20	54	9	12	1	5	2	3	448	97.1	102	67	55	2	48	1.61
2007	28	COL	+0.2	4	3	3.51	75	0	11	0	9	4	4	253	59.0	47	23	33	3	46	1.36
2008	29	CIN	+0.6	1	1	3.33	74	0	20	0	5	1	1	335	78.1	78	29	25	3	80	1.31
2009	30	SF	+0.5	2	2	1.73	74	0	8	0	33	0	0	248	62.1	42	12	31	3	55	1.17
2010	31	SF	+0.1	4	3	4.14	53	0	14	4	7	3	7	228	50.0	56	23	24	3	44	1.60
2011	32	SF	+0.2	3	2	2.63	67	0	12	3	13	3	6	259	61.2	47	18	24	4	54	1.15
2012	33	SF	+0.9	1	2	2.70	67	0	10	3	16	1	4	267	63.1	57	19	23	3	57	1.26
2013	34	SF	-0.2	1	5	3.74	39	0	11	0	11	4	4	146	33.2	27	14	17	4	21	1.31
2014	35	SF	+0.6	4	2	2.28	62	0	9	0	18	3	3	225	55.1	47	14	14	4	41	1.10
2015	36	SF	-0.6	2	2	5.86	52	0	7	0	9	0	0	163	35.1	43	23	14	2	21	1.61
Career	—	14 yrs	+2.5	43	46	3.97	774	42	162	28	142	26	54	4034	926.0	904	408	396	42	720	1.40

Stat definitions →

NUT Breakdown

K Ability

HR Prevention

Walk Avoidance

What's driving Affeldt's career NUT of +2.5

Slice size = share of total NUT. K Ability = Strikeouts · HR Prevention = HR allowed · Walk Avoidance = BB + HBP.

Career NUT Trend

0.9

0203040506070809101112131415

NUT by Season

+0.1

+0.9

+0.2

-1.2

+0.2

+0.6

+0.5

+0.1

+0.2

+0.9

-0.2

+0.6

-0.6

Awards

2009Setup Man of the Year - MLB.com Awards

2010World Series Championship

2012World Series Championship

2014World Series Championship

Minor League

Year	Age	Lv	W	L	ERA	G	GS	CG	SHO	GF	SV	HLD	BF	IP	H	ER	BB	HBP	SO	WHIP
1998	19	A	0	3	9.53	6	3	0	0	0	0	0	90	17.0	27	18	12	0	8	2.29
1999	20	A	7	7	3.83	27	24	2	1	1	0	0	637	143.1	140	61	80	8	111	1.53
2000	21	A+	5	15	4.09	27	26	0	0	0	0	0	656	147.1	158	67	59	10	92	1.47
2001	22	AA	10	6	3.90	25	25	0	0	0	0	0	621	145.1	153	63	46	10	128	1.37
2002	23	AA	0	0	1.50	3	3	0	0	0	0	0	21	6.0	1	1	3	1	3	0.67
2004	25	AAA	0	0	0.00	4	0	0	0	4	3	0	14	4.0	2	0	0	0	5	0.50
2005	26	AAA	0	1	6.48	9	0	0	0	3	0	1	38	8.1	9	6	6	0	9	1.80
2010	31	A+	0	0	0.00	2	2	0	0	0	0	0	12	3.0	2	0	1	0	4	1.00
2014	35	A+	0	0	0.00	2	0	0	0	0	0	2	10	3.0	2	0	0	0	3	0.67
2014	35	AAA	0	1	27.00	2	1	0	0	0	0	0	10	1.1	3	4	2	1	2	3.75
2015	36	AAA	0	0	0.00	2	0	0	0	0	0	0	12	3.0	0	0	1	1	2	0.33

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