How to read this player page

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.

Sonny Siebert 2026 Season · ATH

Career: 140-114, 3.21 ERA, 1512 K in 2152.0 IP.

NUT leaderboard · What is NUT?

Sonny Siebert Stats & Profile | Baseball NUT

Sonny Siebert

P · ATH

Compare

BGood

+4.0Career NUT

+4 to Great

Career

3.21ERA1.21WHIP140W1512K2152.0IP16SV

R/R · 6' 3", 198 lb · b. Jan 14, 1937 · Saint Mary, MO · Signed Undrafted FA, 1964

Player Overview

Year by Year


1964	27	CLE	+0.8	7	9	3.23	41	14	3	1	10	3	0	0	653	156.0	142	56	57	2	144	1.28
1965	28	CLE	+2.9	16	8	2.43	39	27	4	1	5	1	0	0	742	188.2	139	51	46	5	191	0.98
1966	29	CLE	+0.4	16	8	2.80	34	32	11	1	1	1	0	0	957	241.0	193	75	62	6	163	1.06
1967	30	CLE	+0.2	10	12	2.38	34	26	7	1	4	4	0	0	743	185.1	136	49	54	6	136	1.03
1968	31	CLE	-0.4	12	10	2.97	31	30	8	4	0	0	0	0	844	206.0	145	68	88	8	146	1.13
1969	32	CLE	—	0	1	3.21	2	2	0	0	0	0	0	0	60	14.0	10	5	8	0	6	1.29
1969	32	BOS	-0.7	14	10	3.80	43	22	2	0	13	5	3	8	698	163.1	151	69	68	4	127	1.34
1969	32	TOT	-0.8	14	11	3.76	45	24	2	0	13	5	3	8	758	177.1	161	74	76	4	133	1.34
1970	33	BOS	-0.1	15	8	3.44	33	33	7	2	0	0	0	0	916	222.2	207	85	60	6	142	1.20
1971	34	BOS	+0.7	16	10	2.91	32	32	12	4	0	0	0	0	975	235.1	220	76	60	3	131	1.19
1972	35	BOS	-0.1	12	12	3.80	32	30	7	3	0	0	0	0	852	196.1	204	83	59	7	123	1.34
1973	36	BOS	—	0	1	7.71	2	0	0	0	1	0	1	1	13	2.1	5	2	1	0	5	2.57
1973	36	TEX	+0.4	7	11	3.99	25	20	1	1	3	2	2	4	511	119.2	120	53	37	3	76	1.31
1973	36	TOT	+0.3	7	12	4.06	27	20	1	1	4	2	3	5	524	122.0	125	55	38	3	81	1.34
1974	37	STL	+0.1	8	8	3.84	28	20	5	3	4	0	0	0	586	133.2	150	57	51	3	68	1.50
1975	38	SD	-0.1	3	2	4.39	6	6	0	0	0	0	0	0	126	26.2	37	13	10	1	10	1.76
1975	38	OAK	+0.1	4	4	3.69	17	13	0	0	1	0	0	0	275	61.0	60	25	31	0	44	1.49
1975	38	TOT	+0.0	7	6	3.90	23	19	0	0	1	0	0	0	401	87.2	97	38	41	1	54	1.57
Career	—	12 yrs	+4.0	140	114	3.21	399	307	67	21	42	16	6	22	8951	2152.0	1919	767	692	54	1512	1.21

Stat definitions →

NUT Breakdown

K Ability

HR Prevention

Walk Avoidance

What's driving Siebert's career NUT of +4

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

Career NUT Trend

2.9

646566676869707172737475

NUT by Season

+0.8

+2.9

+0.4

+0.2

-0.4

-0.8

-0.1

+0.7

-0.1

+0.3

+0.1

+0.0

Awards

1966AL All-Star · Cleveland BBWAA Man of the Year Award

1971AL All-Star

The week in MLB, ranked by NUT. Free, every Monday.

The week’s top performers by NUT and the games you missed.

Free · At most 1 email a week · Unsubscribe anytimeSee last week’s report→