1904 MLB Earned Run Average by Team

The Boston Americans led all of MLB in earned run average in 1904, with 2.12, 0.05 ahead of the New York Giants. The average across 16 MLB teams is 2.67.

Led all of MLB in 1904 Boston Americans 157 games

2.12 Earned Run Average 0.05 clear of New York Giants

#	Team	League	G	ERA
1	Boston Americans	AL	157	2.12
2	New York Giants	NL	157	2.17
3	Cleveland Naps	AL	154	2.22
4	Chicago Cubs	NL	156	2.30
4	Chicago White Sox	AL	156	2.30
6	Cincinnati Reds	NL	157	2.34
7	Philadelphia Athletics	AL	155	2.35
8	New York Highlanders	AL	155	2.57
9	St. Louis Cardinals	NL	154	2.64
	MLB average			2.67
10	Brooklyn Superbas	NL	154	2.70
11	Detroit Tigers	AL	162	2.77
12	St. Louis Browns	AL	156	2.83
13	Pittsburgh Pirates	NL	156	2.89
14	Philadelphia Phillies	NL	155	3.39
15	Boston Beaneaters	NL	155	3.43
16	Washington Senators	AL	157	3.62

A team's total is its players' numbers for the club added up, so a player traded mid-season counts for each team only what he did there. Rates such as ERA and batting average are worked out from the team's summed totals, not averaged across players.