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.

Jeff Karstens 2026 Season · PIT

Jeff Karstens played in the majors from 2006 to 2012. His career NUT is -2.2, #6,069 of 7,125 pitchers since 1876, and his best season by NUT was 2012 (+0.7). NUT is one number for production against league average: 0.0 is average, and every season is graded against its own league.

Career: 26-40, 4.44 ERA, 330 K in 592.1 IP.

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Jeff Karstens Career Stats & NUT | Baseball NUT

Jeff Karstens

#27

P · PIT

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-2.2Career NUT

+0.2 to Weak

Career

4.44ERA1.33WHIP26W330K592.1IP

Career · season grades

R/R · 6' 3", 185 lb · b. Sep 24, 1982 · San Diego, CA · Draft 2000 (45th Rd, #1326)

Player Overview

Year by Year


2006	23	NYY	-0.2	2	1	3.80	8	6	0	0	2	0	179	42.2	40	18	11	1	16	1.20
2007	24	NYY	—	1	4	11.05	7	3	0	0	2	0	80	14.2	27	18	9	0	5	2.45
2008	25	PIT	-0.3	2	6	4.03	9	9	1	1	0	0	220	51.1	56	23	13	0	23	1.34
2009	26	PIT	-0.7	4	6	5.42	39	13	0	0	8	2	471	108.0	115	65	45	2	52	1.48
2010	27	PIT	-1.0	3	10	4.92	26	19	0	0	1	0	525	122.2	146	67	27	1	72	1.41
2011	28	PIT	-0.7	9	9	3.38	30	26	1	1	1	0	668	162.1	163	61	33	4	96	1.21
2012	29	PIT	+0.7	5	4	3.97	19	15	0	0	0	1	372	90.2	89	40	15	1	66	1.15
Career	—	7 yrs	-2.2	26	40	4.44	138	91	2	2	14	3	2515	592.1	636	292	153	9	330	1.33

Stat definitions →

NUT Breakdown

K Ability

HR Prevention

Walk Avoidance

What's driving Karstens's career NUT of -2.2

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

Career NUT Trend

0.7

060809101112

NUT by Season

-0.2

-0.3

-0.7

-1.0

-0.7

+0.7

Awards

2006INT Pitcher of the Week

2008INT Pitcher of the Week

2011NL Player of the Week

Minor League

Year	Age	Lv	W	L	ERA	G	GS	CG	SHO	GF	HLD	BF	IP	H	ER	BB	HBP	SO	WHIP
2004	21	A+	6	9	4.02	24	24	1	1	0	0	582	138.2	151	62	31	4	116	1.31
2005	22	AA	12	11	4.15	28	27	0	0	0	0	728	169.0	192	78	42	3	147	1.38
2006	23	AA	6	0	2.31	11	11	0	0	0	0	296	74.0	54	19	14	3	67	0.92
2006	23	AAA	5	5	4.28	14	14	1	0	0	0	326	73.2	80	35	30	1	48	1.49
2007	24	A+	0	0	0.00	1	1	0	0	0	0	16	4.0	3	0	1	0	5	1.00
2007	24	AA	1	0	1.80	1	1	0	0	0	0	20	5.0	4	1	2	0	5	1.20
2007	24	AAA	3	0	1.74	6	5	0	0	0	0	124	31.0	25	6	9	0	27	1.10
2008	25	AAA	6	4	3.80	12	12	0	0	0	0	278	68.2	66	29	15	0	55	1.18
2009	26	AAA	0	0	0.00	3	0	0	0	1	1	22	6.0	4	0	0	0	7	0.67
2010	27	AAA	1	2	7.31	5	1	0	0	1	0	71	16.0	21	13	2	0	12	1.44
2012	29	AA	1	0	0.90	2	2	0	0	0	0	37	10.0	8	1	1	0	6	0.90
2012	29	AAA	0	2	4.61	3	3	0	0	0	0	56	13.2	11	7	3	1	13	1.02
2013	30	A+	0	0	3.00	1	1	0	0	0	0	13	3.0	4	1	0	0	4	1.33
2013	30	AA	0	0	0.00	1	1	0	0	0	0	18	4.0	2	0	2	1	4	1.00

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