Randy Johnson career ERA

• Best season on file: 2.28 in 1997.
• Most recent: 4.88 in 2009.

Average of 22 regular seasons, 1988 through 2009. Figures come from ESPN's box scores and were last read on September 21, 2026.

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Randy Johnson 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.
1988	WSH	4	3	0	2.42	26.0	25	7	1.15	0
1989	WSH/SEA	29	7	13	4.82	160.2	130	96	1.51	0
1990	SEA	33	14	11	3.65	219.2	194	120	1.34	0
1991	SEA	33	13	10	3.98	201.1	228	152	1.50	0
1992	SEA	31	12	14	3.77	210.1	241	144	1.42	0
1993	SEA	35	19	8	3.24	255.1	308	99	1.11	1
1994	SEA	23	13	6	3.19	172.0	204	72	1.19	0
1995	SEA	30	18	2	2.48	214.1	294	65	1.05	0
1996	SEA	14	5	0	3.67	61.1	85	25	1.19	1
1997	SEA	30	20	4	2.28	213.0	291	77	1.05	0
1998	HOU/SEA	34	19	11	3.28	244.1	329	86	1.18	0
1999	ARI	35	17	9	2.48	271.2	364	70	1.02	0
2000	ARI	35	19	7	2.64	248.2	347	76	1.12	0
2001	ARI	35	21	6	2.49	249.2	372	71	1.01	0
2002	ARI	35	24	5	2.32	260.0	334	71	1.03	0
2003	ARI	18	6	8	4.26	114.0	125	27	1.33	0
2004	ARI	35	16	14	2.60	245.2	290	44	0.90	0
2005	NYY	34	17	8	3.79	225.2	211	47	1.13	0
2006	NYY	33	17	11	5.00	205.0	172	60	1.24	0
2007	ARI	10	4	3	3.81	56.2	72	13	1.15	0
2008	ARI	30	11	10	3.91	184.0	173	44	1.24	0
2009	SF	22	8	6	4.88	96.0	86	31	1.33	0

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