1970 MLB Earned Run Average by Team

The Baltimore Orioles led all of MLB in earned run average in 1970, with 3.15, 0.08 ahead of the Minnesota Twins. The average across 24 MLB teams is 3.89.

Led all of MLB in 1970 Baltimore Orioles 162 games

3.15 Earned Run Average 0.08 clear of Minnesota Twins

#	Team	League	G	ERA
1	Baltimore Orioles	AL	162	3.15
2	Minnesota Twins	AL	162	3.23
3	New York Yankees	AL	163	3.25
4	Oakland Athletics	AL	162	3.30
5	New York Mets	NL	162	3.46
6	California Angels	AL	162	3.48
7	Cincinnati Reds	NL	162	3.71
7	Pittsburgh Pirates	NL	162	3.71
9	Chicago Cubs	NL	162	3.76
10	Kansas City Royals	AL	162	3.78
11	Washington Senators	AL	162	3.80
12	Los Angeles Dodgers	NL	161	3.83
	MLB average			3.89
13	Boston Red Sox	AL	162	3.90
14	Cleveland Indians	AL	162	3.91
15	St. Louis Cardinals	NL	162	4.06
16	Detroit Tigers	AL	162	4.09
17	Philadelphia Phillies	NL	161	4.17
18	Milwaukee Brewers	AL	163	4.21
19	Houston Astros	NL	162	4.23
20	Atlanta Braves	NL	162	4.35
21	San Diego Padres	NL	162	4.37
22	San Francisco Giants	NL	162	4.50
23	Montreal Expos	NL	162	4.51
24	Chicago White Sox	AL	162	4.56

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.