1931 MLB Earned Run Average by Team

The New York Giants led all of MLB in earned run average in 1931, with 3.30, 0.06 ahead of the St. Louis Stars. The average across 22 MLB teams is 4.16.

Led all of MLB in 1931 New York Giants 153 games

3.30 Earned Run Average 0.06 clear of St. Louis Stars

#	Team	League	G	ERA
1	New York Giants	NL	153	3.30
2	St. Louis Stars	NNL	56	3.36
3	St. Louis Cardinals	NL	154	3.45
4	Philadelphia Athletics	AL	153	3.47
5	Pittsburgh Pirates	NL	155	3.66
6	Washington Senators	AL	156	3.76
7	Brooklyn Robins	NL	153	3.84
8	Boston Braves	NL	156	3.90
9	Chicago Cubs	NL	156	3.97
	MLB average			4.16
10	New York Yankees	AL	155	4.21
11	Cincinnati Reds	NL	154	4.22
12	Detroit Stars	NNL	55	4.27
13	Cleveland Cubs	NNL	44	4.31
13	Indianapolis ABCs	NNL	59	4.31
15	Louisville White Sox	NNL	52	4.55
16	Philadelphia Phillies	NL	155	4.58
17	Detroit Tigers	AL	154	4.59
18	Boston Red Sox	AL	153	4.60
19	Cleveland Indians	AL	155	4.63
20	St. Louis Browns	AL	154	4.76
21	Chicago Columbia Giants	NNL	26	4.78
22	Chicago White Sox	AL	156	5.04

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.