2003 AL Earned Run Average by Team

The Oakland Athletics led the AL in earned run average in 2003, with 3.63, 0.13 ahead of the Seattle Mariners. The average across 14 AL teams is 4.53.

Led the AL in 2003 Oakland Athletics 162 games

3.63 Earned Run Average 0.13 clear of Seattle Mariners

#	Team	G	ERA
1	Oakland Athletics	162	3.63
2	Seattle Mariners	162	3.76
3	New York Yankees	163	4.03
4	Chicago White Sox	162	4.17
5	Cleveland Indians	162	4.21
6	Anaheim Angels	162	4.28
7	Minnesota Twins	162	4.41
8	Boston Red Sox	162	4.49
	AL average		4.53
9	Toronto Blue Jays	162	4.69
10	Baltimore Orioles	163	4.76
11	Tampa Bay Devil Rays	162	4.93
12	Kansas City Royals	162	5.06
13	Detroit Tigers	162	5.32
14	Texas Rangers	162	5.69

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.