Player	TEAM	W	L	WPCT	ERA	H/9	HR/9	BB/9
R Halladay	TOR	20	11	0.645	2.78	8.05	0.66	1.43
J Santana	NYM	16	7	0.696	2.53	7.92	0.88	2.42
C Hamels	PHI	14	10	0.583	3.09	7.65	1.11	2.10
T Lincecum	SF	18	5	0.783	2.62	7.22	0.44	3.33
B Webb	ARI	22	7	0.759	3.3	8.20	0.52	2.59
C Lee	CLE	22	3	0.88	2.54	8.63	0.48	1.37
A Burnett	TOR	18	10	0.643	4.07	8.59	0.77	3.50
E Santana	LAA	16	7	0.696	3.49	8.14	0.95	1.93
M Buehrle	CWS	15	12	0.556	3.79	9.90	0.91	2.14
M Cain	SF	8	14	0.364	3.76	8.54	0.79	3.77
D Haren	ARI	16	8	0.667	3.33	8.50	0.79	1.67
J Shields	TB	14	8	0.636	3.56	8.71	1.00	1.67
R Nolasco	FLA	15	8	0.652	3.52	8.15	1.19	1.78
A Cook	COL	16	9	0.64	3.96	10.06	0.55	2.05
D Lowe	LAD	14	11	0.56	3.24	8.27	0.60	1.92
J Lester	BOS	16	6	0.727	3.21	8.65	0.60	2.83
G Meche	KC	14	11	0.56	3.98	8.74	0.81	3.13
R Oswalt	HOU	17	10	0.63	3.54	8.60	0.99	2.03
J Vazquez	CWS	12	16	0.429	4.67	9.26	1.08	2.64
R Dempster	CHC	17	6	0.739	2.96	7.59	0.61	3.32
G Floyd	CWS	17	8	0.68	3.84	8.30	1.31	3.06
P Maholm	PIT	9	9	0.5	3.71	8.78	0.92	2.75
T Lilly	CHC	17	9	0.654	4.09	8.24	1.41	2.82
A Pettitte	NYY	14	14	0.5	4.54	10.28	0.84	2.43
Z Greinke	KC	13	10	0.565	3.47	9.00	0.94	2.49
S Olsen	FLA	8	11	0.421	4.2	8.72	1.34	3.09
J Verlander	DET	11	17	0.393	4.84	8.73	0.81	3.90
C Billingsley	LAD	16	10	0.615	3.14	8.45	0.63	3.60
F Hernandez	SEA	9	11	0.45	3.45	8.90	0.76	3.60
M Pelfrey	NYM	13	11	0.542	3.72	9.40	0.54	2.88
M Mussina	NYY	20	9	0.69	3.37	9.63	0.76	1.39
B Arroyo	CIN	15	11	0.577	4.77	9.86	1.31	3.06
K Lohse	STL	15	6	0.714	3.78	9.50	0.81	2.21
B Looper	STL	12	14	0.462	4.16	9.77	1.13	2.04
U Jimenez	COL	12	12	0.5	3.99	8.26	0.50	4.68
B Sheets	MIL	13	9	0.591	3.09	8.22	0.77	2.14
J Saunders	LAA	17	7	0.708	3.41	8.50	0.95	2.41
J Garland	LAA	14	8	0.636	4.9	10.87	1.06	2.71
J Moyer	PHI	16	7	0.696	3.71	9.13	0.92	2.85
E Volquez	CIN	17	6	0.739	3.21	7.67	0.64	4.27
J Danks	CWS	12	9	0.571	3.32	8.40	0.69	2.63
G Maddux	LAD	8	13	0.381	4.22	9.46	0.97	1.39
O Perez	NYM	10	7	0.588	4.22	7.75	1.11	4.87
N Blackburn	MIN	11	11	0.5	4.05	10.44	1.07	1.82
A Sonnanstine	TB	13	9	0.591	4.38	9.88	0.98	1.72
T Wellemeyer	STL	13	9	0.591	3.71	8.38	1.18	2.92
J Guthrie	BAL	10	12	0.455	3.63	8.33	1.14	2.74
G Smith	OAK	7	16	0.304	4.16	8.00	0.99	4.12
R Wolf	HOU	12	12	0.5	4.3	9.04	0.99	3.36
B Myers	PHI	10	13	0.435	4.55	9.33	1.37	3.08

A statistical program is recommended. You may need to use the appropriatetechnologyto answer this question.

In baseball, an earned run is any run that the opposing team scores off the pitcher except for runs scored as a result of errors. The earned run average (ERA), the statistic most often used to compare the performance of pitchers, is computed as follows.

ERA =(