Mike Henneman career ERA

• Best season on file: 1.87 in 1988.
• Most recent: 5.79 in 1996.

Average of 10 regular seasons, 1987 through 1996. Figures come from ESPN's box scores and were last read on September 21, 2026.

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Mike Henneman 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.
1987	DET	55	11	3	2.98	96.2	75	30	1.20	7
1988	DET	65	9	6	1.87	91.1	58	24	1.05	22
1989	DET	60	11	4	3.70	90.0	69	51	1.50	8
1990	DET	69	8	6	3.05	94.1	50	33	1.30	22
1991	DET	60	10	2	2.88	84.1	61	34	1.36	21
1992	DET	60	2	6	3.96	77.1	58	20	1.23	24
1993	DET	63	5	3	2.64	71.2	58	32	1.41	24
1994	DET	30	1	3	5.19	34.2	27	17	1.73	8
1995	DET/HOU	50	0	2	2.15	50.1	43	13	1.15	26
1996	TEX	49	0	7	5.79	42.0	34	17	1.38	31

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