Jason Jennings ERA in 2009

• 2nd-best of Jason Jennings' 9 seasons on file; the best is 3.78 in 2006.
• Down 4.43 from 8.56 in 2008.

Lowest of 9 regular seasons, 2001 through 2009. Figures come from ESPN's box scores and were last read on September 23, 2026.

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Jason Jennings ERA in 2009, 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.
2001	COL	7	4	1	4.58	39.1	26	19	1.55	0
2002	COL	32	16	8	4.52	185.1	127	70	1.46	0
2003	COL	32	12	13	5.11	181.1	119	88	1.65	0
2004	COL	33	11	12	5.51	201.0	133	101	1.70	0
2005	COL	20	6	9	5.02	122.0	75	62	1.57	0
2006	COL	32	9	13	3.78	212.0	142	85	1.37	0
2007	HOU	19	2	9	6.45	99.0	71	34	1.55	0
2008	TEX	6	0	5	8.56	27.1	12	18	1.94	0
2009	TEX	44	2	4	4.13	61.0	44	28	1.56	1

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