Single Season

	09/01/2010
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	Single Season Earned Run Average
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* Indicates Hall of Fame, # indicates active Player

Rank	Player	ERA	YEAR	Open Career Leaderboard
1	Ghislain Busoni#	2.599	2010
2	Pancho Hernández#	2.893	2010
3	Andrew Jones#	3.069	2010
4	Tom Pitts#	3.138	2010
5	John Rush#	3.321	2010
6	Geoffrey Moonen#	3.327	2010
7	Carlos Amador#	3.425	2010
8	Ron Melton#	3.451	2010
9	Félix Peña#	3.486	2010
10	Phil Anderson#	3.498	2010
11	Carl Moore#	3.571	2010
12	Marcos Sánchez#	3.667	2010
13	Ying-hua Nao#	3.742	2010
14	Wayne Powers#	3.750	2010
15	Edward Wade#	3.788	2010
16	Gabriel Salinas#	3.805	2010
17	Joop van der Leeden#	3.851	2010
18	Lewis Clemons#	3.888	2010
19	José Miller#	3.937	2010
20	Carl Mitchell#	4.000	2010
21	Mike Bishop#	4.031	2010
22	Félix Magana#	4.105	2010
23	Stanley Weaver#	4.142	2010
24	Doug Roberts#	4.150	2010
25	Luis Gómez#	4.256	2010
25	Orlando Santiago#	4.256	2010
27	Bing-zhang Chia#	4.280	2010
28	Roosevelt Nicholas#	4.282	2010
29	Manny Ortíz#	4.283	2010
30	Bill Cadonau#	4.323	2010
31	Víctor Figueroa#	4.331	2010
32	Esteban Peña#	4.409	2010
33	Felipe Maldonado#	4.484	2010
34	Rich Flowers#	4.500	2010
35	Sam Dupree#	4.558	2010
36	Edward Spellman#	4.564	2010
37	Juan Flores#	4.597	2010
38	Saikaku Tanaka#	4.623	2010
39	Mike Moody#	4.637	2010
40	Michael Drake#	4.645	2010
41	Richard Carpenter#	4.670	2010
42	César Moya#	4.702	2010
43	Gary Young#	4.768	2010
43	John Winters#	4.768	2010
45	Claudio Camacho#	4.796	2010
46	Loren Horton#	4.844	2010
47	Bartolo Ortíz#	4.871	2010
48	Jason Sheehan#	4.890	2010
49	Jesús Gómez#	4.922	2010
50	Simão Panarra#	4.944	2010
51	Mal Rickward#	4.946	2010
52	Iván Padilla#	4.976	2010
53	Dave Sherman#	5.010	2010
54	Ron Denison#	5.065	2010
55	Robert Lilly#	5.127	2010
56	Juan De La Torre#	5.143	2010
57	Adam Powell#	5.202	2010
58	Ernesto García#	5.204	2010
59	Steven Walker#	5.259	2010
60	Roberto Hernández#	5.283	2010
61	Jorge Rodríguez#	5.334	2010
62	Thomas White#	5.344	2010
63	Walt Kennedy#	5.392	2010
64	Júlio Rodríguez#	5.568	2010
65	Jorge Carbajal#	5.608	2010
66	Andrew Randall#	5.612	2010
67	Dan Miller#	5.673	2010
68	Steve Middleton#	5.883	2010
69	Rafael Madrid#	6.018	2010
70	Carlos Ortega#	6.074	2010
71	Rodney Calhoun#	6.616	2010