1984 MLB Earned Run Average by Team

The Pittsburgh Pirates led all of MLB in earned run average in 1984, with 3.11, 0.06 ahead of the Los Angeles Dodgers. The average across 26 MLB teams is 3.81.

Led all of MLB in 1984 Pittsburgh Pirates 162 games

3.11 Earned Run Average 0.06 clear of Los Angeles Dodgers

#	Team	League	G	ERA
1	Pittsburgh Pirates	NL	162	3.11
2	Los Angeles Dodgers	NL	162	3.17
3	Montreal Expos	NL	161	3.31
4	Houston Astros	NL	162	3.33
5	San Diego Padres	NL	162	3.48
6	Detroit Tigers	AL	162	3.49
7	Atlanta Braves	NL	162	3.57
8	St. Louis Cardinals	NL	162	3.58
9	Philadelphia Phillies	NL	162	3.62
10	New York Mets	NL	162	3.63
11	Baltimore Orioles	AL	162	3.71
12	Chicago Cubs	NL	161	3.75
13	New York Yankees	AL	162	3.80
	MLB average			3.81
14	Minnesota Twins	AL	162	3.86
15	Toronto Blue Jays	AL	163	3.87
16	Texas Rangers	AL	161	3.91
17	Kansas City Royals	AL	162	3.92
18	California Angels	AL	162	3.96
19	Milwaukee Brewers	AL	161	4.06
20	Chicago White Sox	AL	162	4.14
21	Cincinnati Reds	NL	162	4.16
22	Boston Red Sox	AL	162	4.19
23	Cleveland Indians	AL	163	4.26
24	Seattle Mariners	AL	162	4.33
25	San Francisco Giants	NL	162	4.39
26	Oakland Athletics	AL	162	4.48

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.