1928 MLB Earned Run Average by Team

The Chicago American Giants led all of MLB in earned run average in 1928, with 3.12, 0.13 ahead of the Brooklyn Robins. The average across 29 MLB teams is 4.43.

#	Team	League	G	ERA
1	Chicago American Giants	NNL	94	3.12
2	Brooklyn Robins	NL	155	3.25
3	Kansas City Monarchs	NNL	80	3.35
4	Philadelphia Athletics	AL	153	3.36
5	St. Louis Cardinals	NL	154	3.38
6	Chicago Cubs	NL	154	3.40
7	New York Giants	NL	155	3.67
8	New York Yankees	AL	154	3.74
9	Washington Senators	AL	155	3.88
10	Cincinnati Reds	NL	153	3.94
11	Pittsburgh Pirates	NL	152	3.95
12	Chicago White Sox	AL	155	3.98
13	St. Louis Stars	NNL	89	4.03
14	Memphis Red Sox	NNL	84	4.14
15	St. Louis Browns	AL	154	4.17
16	Birmingham Black Barons	NNL	99	4.18
17	Detroit Tigers	AL	154	4.32
18	Boston Red Sox	AL	154	4.39
	MLB average			4.43
19	Cleveland Indians	AL	155	4.47
20	Atlantic City Bacharach Giants	ECL	7	4.73
21	Detroit Stars	NNL	89	4.76
22	Baltimore Black Sox	ECL	7	4.79
23	Boston Braves	NL	153	4.83
24	Philadelphia Phillies	NL	152	5.50
25	Cuban Stars West	NNL	54	5.56
26	New York Lincoln Giants	ECL	7	5.73
27	Cuban Stars East	ECL	6	5.92
28	Cleveland Tigers	NNL	79	5.96
29	Philadelphia Tigers	ECL	5	8.07

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.