1920 MLB Earned Run Average by Team

The Chicago American Giants led all of MLB in earned run average in 1920, with 2.36, 0.26 ahead of the Brooklyn Robins. The average across 24 MLB teams is 3.55.

#	Team	League	G	ERA
1	Chicago American Giants	NNL	62	2.36
2	Brooklyn Robins	NL	155	2.62
3	New York Giants	NL	155	2.80
4	Pittsburgh Pirates	NL	155	2.89
5	Cincinnati Reds	NL	154	2.90
6	Detroit Stars	NNL	63	3.26
7	Chicago Cubs	NL	154	3.27
8	New York Yankees	AL	154	3.32
9	Kansas City Monarchs	NNL	79	3.35
10	Cleveland Indians	AL	154	3.41
11	St. Louis Cardinals	NL	155	3.43
12	St. Louis Giants	NNL	72	3.47
13	Boston Braves	NL	153	3.54
	MLB average			3.55
14	Chicago White Sox	AL	154	3.59
15	Philadelphia Phillies	NL	153	3.63
16	Cuban Stars West	NNL	69	3.70
17	Boston Red Sox	AL	154	3.82
18	Philadelphia Athletics	AL	156	3.93
19	Indianapolis ABCs	NNL	85	4.01
20	St. Louis Browns	AL	154	4.03
21	Detroit Tigers	AL	155	4.04
22	Washington Senators	AL	153	4.17
23	Dayton Marcos	NNL	54	4.32
24	Chicago Giants	NNL	36	5.25

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.