1903 MLB Earned Run Average by Team

The Boston Americans led all of MLB in earned run average in 1903, with 2.57, 0.16 ahead of the Cleveland Naps. The average across 16 MLB teams is 3.11.

Led all of MLB in 1903 Boston Americans 141 games

2.57 Earned Run Average 0.16 clear of Cleveland Naps

#	Team	League	G	ERA
1	Boston Americans	AL	141	2.57
2	Cleveland Naps	AL	140	2.73
3	Detroit Tigers	AL	137	2.75
4	Chicago Cubs	NL	139	2.77
4	St. Louis Browns	AL	139	2.77
6	Pittsburgh Pirates	NL	141	2.91
7	New York Giants	NL	142	2.95
8	Philadelphia Athletics	AL	137	2.98
9	Chicago White Sox	AL	138	3.02
10	Cincinnati Reds	NL	141	3.07
11	New York Highlanders	AL	136	3.08
	MLB average			3.11
12	Boston Beaneaters	NL	140	3.34
13	Brooklyn Superbas	NL	139	3.44
14	St. Louis Cardinals	NL	139	3.67
15	Washington Senators	AL	140	3.82
16	Philadelphia Phillies	NL	139	3.96

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.