Don Mossi career ERA

• Best season on file: 1.94 in 1954.
• Most recent: 3.74 in 1965.

Average of 12 regular seasons, 1954 through 1965. Figures come from ESPN's box scores and were last read on September 21, 2026.

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Don Mossi 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.
1954	CLE	40	6	1	1.94	93.0	55	39	1.02	7
1955	CLE	57	4	3	2.42	81.2	69	18	1.21	9
1956	CLE	48	6	5	3.59	87.2	59	33	1.28	11
1957	CLE	36	11	10	4.13	159.0	97	57	1.40	2
1958	CLE	43	7	8	3.90	101.2	55	30	1.34	3
1959	DET	34	17	9	3.36	228.0	125	49	1.14	0
1960	DET	23	9	8	3.47	158.1	69	32	1.20	0
1961	DET	35	15	7	2.96	240.1	137	47	1.18	1
1962	DET	35	11	13	4.19	180.1	121	36	1.28	1
1963	DET	24	7	7	3.74	122.2	68	17	1.04	2
1964	CHW	34	3	1	2.93	40.0	36	7	1.10	7
1965	ATH	51	5	8	3.74	55.1	41	20	1.43	7

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