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The big number is this season's NUT, his total production against league average, with its letter grade. Below that are 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 Fassero 2026 Season · Mayos de Navojoa

Career: 121-124, 4.11 ERA, 1643 K in 2033.2 IP.

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Jeff Fassero Stats & Profile | Baseball NUT

Jeff Fassero

#13

P · Mayos de Navojoa

Compare

AGreat

+11.1Career NUT

+6.9 to Nutty

Career

4.11ERA1.38WHIP121W1643K2033.2IP25SV

L/L · 6' 1", 215 lb · b. Jan 5, 1963 · Springfield, IL · Draft 1989 (1st Rd, #8)

Player Overview

Year by Year


1991	28	MON	+0.9	2	5	2.44	51	0	0	0	30	8	0	0	8	223	55.1	39	15	17	1	42	1.01
1992	29	MON	+1.1	8	7	2.84	70	0	0	0	22	1	0	0	1	368	85.2	81	27	34	2	63	1.34
1993	30	MON	+2.3	12	5	2.29	56	15	1	0	10	1	0	0	1	616	149.2	119	38	54	0	140	1.16
1994	31	MON	+1.5	8	6	2.99	21	21	1	0	0	0	0	0	0	569	138.2	119	46	40	1	119	1.15
1995	32	MON	+1.7	13	14	4.33	30	30	1	0	0	0	0	0	0	833	189.0	207	91	74	2	164	1.49
1996	33	MON	+3.6	15	11	3.30	34	34	5	1	0	0	0	0	0	967	231.2	217	85	55	3	222	1.17
1997	34	SEA	+1.6	16	9	3.61	35	35	2	1	0	0	0	0	0	1010	234.1	226	94	84	3	189	1.32
1998	35	SEA	-0.2	13	12	3.97	32	32	7	0	0	0	0	0	0	954	224.2	223	99	66	10	176	1.29
1999	36	SEA	-2.6	4	14	7.38	30	24	0	0	1	0	2	0	0	669	139.0	188	114	73	4	101	1.88
1999	36	TEX	—	1	0	5.71	7	3	0	0	1	0	0	0	0	82	17.1	20	11	10	0	13	1.73
1999	36	TOT	-2.5	5	14	7.20	37	27	0	0	2	0	2	0	0	751	156.1	208	125	83	4	114	1.86
2000	37	BOS	+0.5	8	8	4.78	38	23	0	0	4	0	5	0	0	577	130.0	153	69	50	1	97	1.56
2001	38	CHC	+1.2	4	4	3.42	82	0	0	0	30	12	25	5	17	308	73.2	66	28	23	1	79	1.21
2002	39	CHC	+0.2	5	6	6.18	57	0	0	0	17	0	6	1	1	240	51.0	65	35	22	3	44	1.71
2002	39	STL	—	3	0	3.00	16	0	0	0	1	0	7	2	2	75	18.0	16	6	5	0	12	1.17
2002	39	TOT	+0.0	8	6	5.35	73	0	0	0	18	0	13	3	3	315	69.0	81	41	27	3	56	1.57
2003	40	STL	-1.2	1	7	5.68	62	6	0	0	15	3	11	3	6	354	77.2	93	49	34	2	55	1.64
2004	41	COL	+0.1	3	8	5.51	40	12	0	0	2	0	2	0	0	505	111.0	136	68	44	4	59	1.62
2004	41	ARI	—	0	0	0.00	1	0	0	0	0	0	0	0	0	3	1.0	0	0	0	0	1	0.00
2004	41	TOT	+0.2	3	8	5.46	41	12	0	0	2	0	2	0	0	508	112.0	136	68	44	4	60	1.61
2005	42	SF	+0.6	4	7	4.05	48	6	0	0	11	0	2	2	2	384	91.0	92	41	31	0	60	1.35
2006	43	SF	—	1	1	7.80	10	1	0	0	2	0	0	0	0	73	15.0	23	13	8	0	7	2.07
Career	—	16 yrs	+11.1	121	124	4.11	720	242	17	2	146	25	60	13	38	8810	2033.2	2083	929	724	37	1643	1.38

Stat definitions →

NUT Breakdown

K Ability

HR Prevention

Walk Avoidance

What's driving Fassero's career NUT of +11.1

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

Career NUT Trend

3.6

919293949596979899000102030405

NUT by Season

+0.9

+1.1

+2.3

+1.5

+1.7

+3.6

+1.6

-0.2

-2.5

+0.5

+1.2

+0.0

-1.2

+0.2

+0.6

Awards

1996NL Pitcher of the Month

1997AL Pitcher of the Month

Minor League

Year	Age	Lv	W	L	ERA	G	GS	CG	SHO	GF	SV	SVO	BF	IP	H	ER	BB	HBP	SO	WHIP
1988	25	AA	5	5	3.58	70	1	0	0	36	17	17	375	78.0	97	31	41	3	72	1.77
1989	26	AA	4	1	1.64	6	6	2	1	0	0	0	174	44.0	32	8	12	1	38	1.00
1989	26	AAA	3	10	5.22	22	19	0	0	0	0	0	511	112.0	136	65	47	2	73	1.63
1990	27	AA	5	4	2.80	61	0	0	0	30	6	6	281	64.1	66	20	24	1	61	1.40
1991	28	AAA	3	0	1.47	18	0	0	0	11	4	4	71	18.1	11	3	7	1	12	0.98

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