Mike Mussina ERA in 2004

• 16th-best of Mike Mussina's 18 seasons on file; the best is 2.54 in 1992.
• Up 1.19 from 3.40 in 2003.

Figures come from ESPN's box scores and were last read on September 22, 2026.

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Mike Mussina ERA in 2004, 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.
1991	BAL	12	4	5	2.87	87.2	52	21	1.12	0
1992	BAL	32	18	5	2.54	241.0	130	48	1.08	0
1993	BAL	25	14	6	4.46	167.2	117	44	1.23	0
1994	BAL	24	16	5	3.06	176.1	99	42	1.16	0
1995	BAL	32	19	9	3.29	221.2	158	50	1.07	0
1996	BAL	36	19	11	4.81	243.1	204	69	1.37	0
1997	BAL	33	15	8	3.20	224.2	218	54	1.12	0
1998	BAL	29	13	10	3.49	206.1	175	41	1.11	0
1999	BAL	31	18	7	3.50	203.1	172	52	1.27	0
2000	BAL	34	11	15	3.79	237.2	210	46	1.19	0
2001	NYY	34	17	11	3.15	228.2	214	42	1.07	0
2002	NYY	33	18	10	4.05	215.2	182	48	1.19	0
2003	NYY	31	17	8	3.40	214.2	195	40	1.08	0
2004	NYY	27	12	9	4.59	164.2	132	40	1.32	0
2005	NYY	30	13	8	4.41	179.2	142	47	1.37	0
2006	NYY	32	15	7	3.51	197.1	172	35	1.11	0
2007	NYY	28	11	10	5.15	152.0	91	35	1.47	0
2008	NYY	34	20	9	3.37	200.1	150	31	1.22	0

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