Jack Morris career ERA

• Best season on file: 3.05 in 1981.
• Most recent: 5.60 in 1994.

Average of 18 regular seasons, 1977 through 1994. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Jack Morris 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.
1977	DET	7	1	1	3.72	46.0	28	23	1.33	0
1978	DET	28	3	5	4.33	106.0	48	49	1.47	0
1979	DET	27	17	7	3.27	198.0	113	59	1.20	0
1980	DET	36	16	15	4.18	250.0	112	87	1.36	0
1981	DET	25	14	7	3.05	198.0	97	78	1.17	0
1982	DET	37	17	16	4.06	266.1	135	96	1.29	0
1983	DET	37	20	13	3.34	293.2	232	83	1.16	0
1984	DET	35	19	11	3.60	240.1	148	87	1.28	0
1985	DET	35	16	11	3.33	257.0	191	110	1.25	0
1986	DET	35	21	8	3.27	267.0	223	82	1.16	0
1987	DET	34	18	11	3.38	266.0	208	93	1.20	0
1988	DET	34	15	13	3.94	235.0	168	83	1.31	0
1989	DET	24	6	14	4.86	170.1	115	59	1.46	0
1990	DET	36	15	18	4.51	249.2	162	97	1.31	0
1991	MIN	35	18	12	3.43	246.2	163	92	1.29	0
1992	TOR	34	21	6	4.04	240.2	132	80	1.25	0
1993	TOR	27	7	12	6.19	152.2	103	65	1.66	0
1994	CLE	23	10	6	5.60	141.1	100	67	1.63	0

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