Bronson Arroyo career ERA

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4.28Career Regular Season

Bronson Arroyo has a career ERA of 4.28 over 16 regular seasons.

• Best season on file: 2.08 in 2003.
• Most recent: 7.35 in 2017.

Average of 16 regular seasons, 2000 through 2017. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Bronson Arroyo 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.
2000	PIT	20	2	6	6.40	71.2	50	36	1.73	0
2001	PIT	24	5	7	5.09	88.1	39	34	1.51	0
2002	PIT	9	2	1	4.00	27.0	22	15	1.67	0
2003	BOS	6	0	0	2.08	17.1	14	4	0.81	1
2004	BOS	32	10	9	4.03	178.2	142	47	1.22	0
2005	BOS	35	14	10	4.51	205.1	100	54	1.30	0
2006	CIN	35	14	11	3.29	240.2	184	64	1.19	0
2007	CIN	34	9	15	4.23	210.2	156	63	1.40	0
2008	CIN	34	15	11	4.77	200.0	163	68	1.44	0
2009	CIN	33	15	13	3.84	220.1	127	65	1.27	0
2010	CIN	33	17	10	3.88	215.2	121	59	1.15	0
2011	CIN	32	9	12	5.07	199.0	108	45	1.37	0
2012	CIN	32	12	10	3.74	202.0	129	35	1.21	0
2013	CIN	32	14	12	3.79	202.0	124	34	1.15	0
2014	ARI	14	7	4	4.08	86.0	47	19	1.29	0
2017	CIN	14	3	6	7.35	71.0	45	19	1.59	0

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