Claude Osteen career ERA

• Best season on file: 2.25 in 1957.
• Most recent: 4.36 in 1975.

Average of 18 regular seasons, 1957 through 1975. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Claude Osteen career ERA, season by season

Season↓	Team↓	GP↓iGP: Games the player appeared in, however briefly.	W↓iW: Games in which this pitcher was credited with the win.	L↓iL: Games in which this pitcher was charged with the loss.	ERA↓iERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.	IP↓iIP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.	K↓iK: Batters this pitcher struck out.	BB↓iBB: Times the batter reached first base on four balls.	WHIP↓iWHIP: Walks and hits allowed per inning pitched — lower is better. Around 1.00 is elite.	SV↓iSV: Games finished by protecting a narrow lead to the last out.
1957	CIN	3	0	0	2.25	4.0	3	3	1.75	0
1959	CIN	2	0	0	7.04	7.2	3	9	2.61	0
1960	CIN	20	0	1	5.03	48.1	15	30	1.72	0
1961	CIN/TEX	4	1	1	4.82	18.2	14	9	1.23	0
1962	TEX	28	8	13	3.65	150.1	59	47	1.24	1
1963	TEX	40	9	14	3.35	212.1	109	60	1.33	0
1964	TEX	37	15	13	3.33	257.0	133	64	1.25	0
1965	LAD	40	15	15	2.79	287.0	162	78	1.15	0
1966	LAD	39	17	14	2.85	240.1	137	65	1.26	0
1967	LAD	39	17	17	3.22	288.1	152	52	1.21	0
1968	LAD	39	12	18	3.09	253.2	119	54	1.27	0
1969	LAD	41	20	15	2.66	321.0	183	74	1.14	0
1970	LAD	37	16	14	3.83	258.2	114	52	1.28	0
1971	LAD	38	14	11	3.51	259.0	109	63	1.25	0
1972	LAD	33	20	11	2.64	252.0	100	69	1.19	0
1973	LAD	33	16	11	3.31	236.2	86	61	1.22	0
1974	HOU/STL	31	9	11	3.80	161.0	51	58	1.50	0
1975	CHW	37	7	16	4.36	204.1	63	92	1.61	0

What the columns mean: W · L · ERA · IP · K · BB · WHIP · SV