2018 AL Earned Run Average by Team

The Houston Astros led the AL in earned run average in 2018, with 3.11, 0.64 ahead of the Boston Red Sox. The average across 15 AL teams is 4.27.

Led the AL in 2018 Houston Astros 162 games

3.11 Earned Run Average 0.64 clear of Boston Red Sox

#	Team	G	ERA
1	Houston Astros	162	3.11
2	Boston Red Sox	162	3.75
2	Tampa Bay Rays	162	3.75
4	Cleveland Indians	162	3.77
5	New York Yankees	162	3.78
6	Oakland Athletics	162	3.82
7	Seattle Mariners	162	4.13
8	Los Angeles Angels of Anaheim	162	4.15
	AL average		4.27
9	Minnesota Twins	162	4.50
10	Detroit Tigers	162	4.60
11	Chicago White Sox	162	4.85
11	Toronto Blue Jays	162	4.85
13	Texas Rangers	162	4.92
14	Kansas City Royals	162	4.95
15	Baltimore Orioles	162	5.19

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.