Antonio Alfonseca ERA in 2007

• 9th-best of Antonio Alfonseca's 11 seasons on file; the best is 2.57 in 2004.
• Down 0.19 from 5.63 in 2006.

Best of 11 regular seasons, 1997 through 2007. Figures come from ESPN's box scores and were last read on September 22, 2026.

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Antonio Alfonseca ERA in 2007, 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.
1997	MIA	17	1	3	4.91	25.2	19	10	1.79	0
1998	MIA	58	4	6	4.08	70.2	46	33	1.53	8
1999	MIA	73	4	5	3.24	77.2	46	29	1.39	21
2000	MIA	68	5	6	4.24	70.0	47	24	1.51	45
2001	MIA	58	4	4	3.06	61.2	40	15	1.35	28
2002	CHC	66	2	5	4.00	74.1	61	36	1.47	19
2003	CHC	60	3	1	5.83	66.1	51	27	1.55	0
2004	ATL	79	6	4	2.57	73.2	45	28	1.34	0
2005	MIA	33	1	1	4.94	27.1	16	14	1.57	0
2006	TEX	19	0	0	5.63	16.0	5	7	1.88	0
2007	PHI	61	5	2	5.44	49.2	24	27	1.85	8

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