Sandy Koufax career ERA

• Best season on file: 1.73 in 1966.

Average of 12 regular seasons, 1955 through 1966. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Sandy Koufax 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.
1955	LAD	12	2	2	3.02	41.2	30	28	1.46	0
1956	LAD	16	2	4	4.91	58.2	30	29	1.62	0
1957	LAD	34	5	4	3.88	104.1	122	51	1.28	0
1958	LAD	40	11	11	4.48	158.2	131	105	1.49	1
1959	LAD	35	8	6	4.05	153.1	173	92	1.49	2
1960	LAD	37	8	13	3.91	175.0	197	100	1.33	1
1961	LAD	42	18	13	3.52	255.2	269	96	1.20	1
1962	LAD	28	14	7	2.54	184.1	216	57	1.04	1
1963	LAD	40	25	5	1.88	311.0	306	58	0.87	0
1964	LAD	29	19	5	1.74	223.0	223	53	0.93	1
1965	LAD	43	26	8	2.04	335.2	382	71	0.86	2
1966	LAD	41	27	9	1.73	323.0	317	77	0.98	0

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