1938 MLB Earned Run Average by Team

The Chicago Cubs led all of MLB in earned run average in 1938, with 3.37, 0.01 ahead of the Homestead Grays. The average across 30 MLB teams is 4.57.

Led all of MLB in 1938 Chicago Cubs 154 games

3.37 Earned Run Average 0.01 clear of Homestead Grays

#	Team	League	G	ERA
1	Chicago Cubs	NL	154	3.37
2	Homestead Grays	NN2	52	3.38
3	Boston Bees	NL	153	3.40
4	Kansas City Monarchs	NAL	68	3.41
5	Pittsburgh Pirates	NL	152	3.46
6	Chicago American Giants	NAL	65	3.50
7	Cincinnati Reds	NL	151	3.62
7	New York Giants	NL	152	3.62
9	St. Louis Cardinals	NL	156	3.84
10	New York Yankees	AL	157	3.91
11	Brooklyn Dodgers	NL	151	4.07
12	Atlanta Black Crackers	NAL	54	4.14
13	Baltimore Elite Giants	NN2	47	4.28
13	Jacksonville Red Caps	NAL	23	4.28
15	Chicago White Sox	AL	149	4.36
16	Boston Red Sox	AL	150	4.46
17	Newark Eagles	NN2	52	4.51
	MLB average			4.57
18	Cleveland Indians	AL	153	4.60
19	Detroit Tigers	AL	155	4.79
20	Philadelphia Phillies	NL	151	4.93
21	Washington Senators	AL	152	4.94
22	Birmingham Black Barons	NAL	48	5.05
23	Indianapolis ABCs	NAL	38	5.29
24	Memphis Red Sox	NAL	58	5.36
25	Pittsburgh Crawfords	NN2	49	5.38
26	Philadelphia Athletics	AL	154	5.48
27	Philadelphia Stars	NN2	68	5.66
28	St. Louis Browns	AL	156	5.80
29	New York Black Yankees	NN2	39	5.88
30	Washington Black Senators	NN2	21	8.45

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.