What years did Sonny Siebert play?

Sonny Siebert played in Major League Baseball from 1964 to 1975.

Was Sonny Siebert a pitcher?

Yes. Sonny Siebert pitched in the major leagues, recording 140 wins and 1512 strikeouts.

How many home runs did Sonny Siebert hit?

Sonny Siebert hit 12 career home runs with 114 hits.

What was Sonny Siebert's career batting average?

Sonny Siebert batted .173 over his career, with 114 hits in 660 at bats.

How many RBI did Sonny Siebert have?

Sonny Siebert drove in 57 runs in his career.

What was Sonny Siebert's career ERA?

Sonny Siebert finished with a 3.21 career ERA, going 140-114 with 1,512 strikeouts.

Sonny Siebert

Pitcher · Career Stats, Bio & Records (1964-1975)

Sonny Siebert was a pitcher who played in Major League Baseball from 1964 to 1975 for 6 teams, including the Cleveland Guardians, a span of 12 seasons. Across 399 career appearances, he went 140-114 with a 3.21 ERA and 1,512 strikeouts. He also batted .173 with 12 home runs. Sonny Siebert was a 2-time All-Star. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 8639.3.

W (Wins):: Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):: Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):: For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):: Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated September 8, 2026

W–L 140–114

ERA 3.21

WHIP 1.21

SO 1,512

Pitcher PIV 8639.3

Position: Pitcher
Bats / Throws: R / R
Height / Weight: 6'3" / 190 lb
Born: 1/14/1937 in St. Mary, MO, USA
MLB Debut: 1964-04-26
Last Game: 1975-09-25
Awards: 2× All-Star

Full name: Wilfred Charles Siebert

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Career Pitching Statistics

Sonny Siebert — Career Pitching Statistics
W	L	G	GS	CG	SHO	SV	IP	H	ER	HR	BB	SO	ERA	Pitcher PIV
140	114	399	307	67	21	16	2152.0	1,919	767	197	692	1,512	3.21	8639.3

Career ERA 3.21 vs. league average 3.53 across their career seasons — 9.1% better than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Sonny Siebert Stats, Bio & Career Records
Year	Team	Lg	W	L	G	GS	CG	SHO	SV	IP	H	ER	BB	SO	ERA	Lg ERA	Pitcher PIV
1964	CLE	AL	7	9	41	14	3	1	3	156.0	142	56	57	144	3.23	3.58 (+10%)	1759.5
1965	CLE	AL	16	8	39	27	4	1	1	188.7	139	51	46	191	2.43	3.50 (+30%)	6030.3
1966	CLE	AL	16	8	34	32	11	1	1	241.0	193	75	62	163	2.80	3.52 (+20%)	782.0
1967	CLE	AL	10	12	34	26	7	1	4	185.3	136	49	54	136	2.38	3.30 (+28%)	328.9
1968	CLE	AL	12	10	31	30	8	4	0	206.0	145	68	88	146	2.97	2.98 (avg)	-725.8
1969	CLE	AL	0	1	2	2	0	0	0	14.0	10	5	8	6	3.21	3.61 (+11%)	-238.5
1969	BOS	AL	14	10	43	22	2	0	5	163.3	151	69	68	127	3.80	3.61 (-5%)	-1366.0
1970	BOS	AL	15	8	33	33	7	2	0	222.7	207	85	60	142	3.44	3.89 (+12%)	-330.8
1971	BOS	AL	16	10	32	32	12	4	0	235.3	220	76	60	131	2.91	3.47 (+16%)	1375.2
1972	BOS	AL	12	12	32	30	7	3	0	196.3	204	83	59	123	3.80	3.26 (-17%)	-79.4
1973	BOS	AL	0	1	2	0	0	0	0	2.3	5	2	1	5	7.71	—	0.0
1973	TEX	AL	7	11	25	20	1	1	2	119.7	120	53	37	76	3.99	3.75 (-6%)	774.8
1974	SLN	NL	8	8	28	20	5	3	0	133.7	150	57	51	68	3.84	3.63 (-6%)	262.8
1975	SDN	NL	3	2	6	6	0	0	0	26.7	37	13	10	10	4.39	3.71 (-18%)	-225.9
1975	OAK	AL	4	4	17	13	0	0	0	61.0	60	25	31	44	3.69	3.71 (+1%)	292.1
Career · 15 seasons			140	114	399	307	67	21	16	2,152.0	1,919	767	692	1,512	3.21	—	8,639

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Sonny Siebert — Career Batting Statistics
G	AB	R	H	2B	3B	HR	RBI	SB	BB	SO	AVG	OBP	SLG	OPS	PIV
405	660	52	114	22	3	12	57	0	18	182	.173	.204	.270	.474	-2,794

Career AVG .173 vs. league average .250 across their career seasons — 30.8% below league average.

Career OBP .204 vs. league average .316 across their career seasons — 35.4% below league average.

Career SLG .270 vs. league average .369 across their career seasons — 26.8% below league average.

Career OPS .474 vs. league average .685 across their career seasons — 30.8% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Sonny Siebert Stats, Bio & Career Records
Year	Team	Lg	G	AB	R	H	2B	3B	HR	RBI	BB	SO	AVG	Lg AVG	Lg OBP	Lg SLG	Lg OPS	PIV
1964	CLE	AL	42	49	5	13	2	1	2	6	1	9	.265	—	—	—	—	41.2
1965	CLE	AL	40	66	2	7	1	0	1	4	0	18	.106	.245 (-57%)	.310 (-66%)	.371 (-55%)	.682 (-60%)	-620.5
1966	CLE	AL	34	85	4	11	2	0	0	3	1	21	.129	.248 (-48%)	.309 (-55%)	.376 (-59%)	.685 (-58%)	-755.5
1967	CLE	AL	34	52	4	7	2	2	1	3	0	13	.135	.242 (-44%)	.306 (-56%)	.357 (-14%)	.663 (-33%)	-289.8
1968	CLE	AL	33	70	2	11	3	0	0	6	1	23	.157	.236 (-34%)	.298 (-36%)	.340 (-41%)	.638 (-39%)	-388.4
1969	CLE	AL	2	4	0	1	0	0	0	0	0	0	.250	—	—	—	—	0.0
1969	BOS	AL	43	53	5	8	1	0	1	3	3	20	.151	.248 (-39%)	.320 (-34%)	.369 (-39%)	.689 (-37%)	0.0
1970	BOS	AL	33	77	5	10	3	0	0	4	1	17	.130	.253 (-49%)	.325 (-50%)	.385 (-56%)	.711 (-53%)	-651.5
1971	BOS	AL	32	79	10	21	3	0	6	15	1	20	.266	.249 (+7%)	.316 (-9%)	.365 (+46%)	.682 (+20%)	206.0
1972	BOS	AL	33	72	11	17	4	0	1	9	5	21	.236	.243 (-3%)	.310 (-2%)	.353 (-6%)	.664 (-4%)	-37.1
1973	BOS	AL	2	0	0	0	0	0	0	0	0	0	.000	—	—	—	—	0.0
1973	TEX	AL	25	0	0	0	0	0	0	0	0	0	.000	—	—	—	—	0.0
1974	SLN	NL	28	44	3	5	0	0	0	3	3	17	.114	—	—	—	—	0.0
1975	SDN	NL	7	8	1	3	1	0	0	1	2	2	.375	—	—	—	—	0.0
1975	OAK	AL	17	1	0	0	0	0	0	0	0	1	.000	—	—	—	—	0.0
Career · 15 seasons			405	660	52	114	22	3	12	57	18	182	.173	—	—	—	—	-2,496

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Game Log & Splits

View full game log (804 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Sonny Siebert — Batting — Home / Away
Split	G	AB	R	H	HR	RBI	AVG
Home	203	335	29	66	8	43	.197
Away	202	325	23	48	4	14	.148

Pitching — Home / Away

Sonny Siebert — Pitching — Home / Away
Split	G	IP	H	ER	BB	SO	ERA
Home	200	1130.0	1002	402	361	819	3.20
Away	199	1021.2	917	365	331	693	3.22

Last 10 Games — Batting

Sonny Siebert — Last 10 Games — Batting
Date	Tm	Opp	Res	AB	SO
1975-09-25	OAK	CHW	L	1	1
1975-09-21	OAK	KCR	L	0	0
1975-09-18	OAK	CHW	W	0	0
1975-09-14	OAK	MIN	L	0	0
1975-09-12	OAK	MIN	L	0	0
1975-09-07	OAK	TEX	W	0	0
1975-08-31	OAK	BOS	W	0	0
1975-08-26	OAK	NYY	L	0	0
1975-08-20	OAK	DET	W	0	0
1975-08-09	OAK	BOS	L	0	0

Last 10 Games — Pitching

Sonny Siebert — Last 10 Games — Pitching
Date	Tm	Opp	Dec	IP	H	R	ER	BB	SO	HR
1975-09-25	OAK	CHW	—	1.2	2	1	1	2	3	0
1975-09-21	OAK	KCR	—	2.0	0	0	0	0	1	0
1975-09-18	OAK	CHW	—	2.2	3	2	1	1	0	0
1975-09-14	OAK	MIN	—	1.1	3	2	2	0	1	0
1975-09-12	OAK	MIN	—	3.1	1	1	1	4	5	0
1975-09-07	OAK	TEX	W	5.0	3	1	1	3	3	1
1975-08-31	OAK	BOS	—	2.2	4	3	3	3	1	0
1975-08-26	OAK	NYY	L	4.1	9	3	3	1	3	0
1975-08-20	OAK	DET	W	5.0	3	1	1	0	2	0
1975-08-09	OAK	BOS	L	2.2	6	5	5	2	3	2

Fielding Statistics

Career Fielding Totals by Position

Sonny Siebert — Career Fielding Totals by Position
Position	G	GS	PO	A	E	DP
P	399	307	159	329	26	28

Season-by-Season Fielding

Sonny Siebert — Season-by-Season Fielding
Year	Team	Pos	G	GS	PO	A	E	DP
1964	CLE	P	41	14	6	16	3	1
1965	CLE	P	39	27	15	29	2	4
1966	CLE	P	34	32	19	46	4	4
1967	CLE	P	34	26	8	21	2	2
1968	CLE	P	31	30	18	33	4	2
1969	CLE	P	2	2	0	2	0	0
1969	BOS	P	43	22	6	34	1	6
1970	BOS	P	33	33	25	26	2	3
1971	BOS	P	32	32	15	42	4	0
1972	BOS	P	32	30	24	30	2	2
1973	BOS	P	2	0	0	0	0	0
1973	TEX	P	25	20	13	25	0	0
1974	SLN	P	28	20	6	16	0	3
1975	SDN	P	6	6	1	5	2	1
1975	OAK	P	17	13	3	4	0	0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Sonny Siebert Stats, Bio & Career Records
Position	Games
Pitcher	399

College History

Sonny Siebert — College History
School Name	City	State	Years Attended
University of Missouri Columbia	Columbia	MO	1958

Award Voting History

Sonny Siebert — Award Voting History
Year	Award	League	Finish	Points Won	Points Max	Votes First
1966	Most Valuable Player	AL	28th	1.0	280	0

Most Similar Players

Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.

Career Spans

Sonny Siebert (highlighted) compared to peers across the same era.

Frequently Asked Questions about Sonny Siebert

What years did Sonny Siebert play?: Sonny Siebert played in Major League Baseball from 1964 to 1975.
Was Sonny Siebert a pitcher?: Yes. Sonny Siebert pitched in the major leagues, recording 140 wins and 1512 strikeouts.
How many home runs did Sonny Siebert hit?: Sonny Siebert hit 12 career home runs with 114 hits.
What was Sonny Siebert's career batting average?: Sonny Siebert batted .173 over his career, with 114 hits in 660 at bats.
How many RBI did Sonny Siebert have?: Sonny Siebert drove in 57 runs in his career.
What was Sonny Siebert's career ERA?: Sonny Siebert finished with a 3.21 career ERA, going 140-114 with 1,512 strikeouts.