1981 MLB Earned Run Average by Team

The Houston Astros led all of MLB in earned run average in 1981, with 2.66, 0.24 ahead of the New York Yankees. The average across 26 MLB teams is 3.59.

Led all of MLB in 1981 Houston Astros 110 games

2.66 Earned Run Average 0.24 clear of New York Yankees

#	Team	League	G	ERA
1	Houston Astros	NL	110	2.66
2	New York Yankees	AL	107	2.90
3	Los Angeles Dodgers	NL	110	3.01
4	San Francisco Giants	NL	111	3.28
5	Montreal Expos	NL	108	3.30
5	Oakland Athletics	AL	109	3.30
7	Texas Rangers	AL	105	3.40
8	Atlanta Braves	NL	107	3.45
9	Chicago White Sox	AL	106	3.50
10	Detroit Tigers	AL	109	3.54
11	New York Mets	NL	105	3.55
12	Kansas City Royals	AL	103	3.56
12	Pittsburgh Pirates	NL	103	3.56
	MLB average			3.59
14	St. Louis Cardinals	NL	103	3.63
15	Baltimore Orioles	AL	105	3.70
16	California Angels	AL	110	3.71
17	Cincinnati Reds	NL	108	3.73
17	San Diego Padres	NL	110	3.73
19	Toronto Blue Jays	AL	106	3.81
20	Boston Red Sox	AL	108	3.83
21	Cleveland Indians	AL	103	3.88
22	Milwaukee Brewers	AL	109	3.91
23	Minnesota Twins	AL	110	3.98
24	Chicago Cubs	NL	106	4.02
25	Philadelphia Phillies	NL	107	4.05
26	Seattle Mariners	AL	110	4.24

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.