2012 AL Earned Run Average by Team

The Tampa Bay Rays led the AL in earned run average in 2012, with 3.19, 0.31 ahead of the Oakland Athletics. The average across 14 AL teams is 4.09.

Led the AL in 2012 Tampa Bay Rays 162 games

3.19 Earned Run Average 0.31 clear of Oakland Athletics

#	Team	G	ERA
1	Tampa Bay Rays	162	3.19
2	Oakland Athletics	162	3.50
3	Seattle Mariners	162	3.76
4	Detroit Tigers	162	3.77
5	New York Yankees	162	3.85
6	Baltimore Orioles	162	3.90
7	Chicago White Sox	162	4.02
7	Los Angeles Angels of Anaheim	162	4.02
7	Texas Rangers	162	4.02
	AL average		4.09
10	Kansas City Royals	162	4.30
11	Toronto Blue Jays	162	4.64
12	Boston Red Sox	162	4.72
13	Minnesota Twins	162	4.77
14	Cleveland Indians	162	4.79

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.