1966 Earned Run Average Leaders Top 25 in the American League
Name	Earned Run Average	Team	Rank
Gary Peters	1.98 (1.9788)	Chicago White Sox	1
Joe Horlen	2.43 (2.4313)	Chicago White Sox	2
Steve Hargan	2.48 (2.4844)	Cleveland Indians	3
Jim Perry	2.54 (2.5389)	Minnesota Twins	4
Tommy John	2.62 (2.6233)	Chicago White Sox	5
Jim Kaat	2.75 (2.7473)	Minnesota Twins	6
Sonny Siebert	2.80 (2.8008)	Cleveland Indians	7
Sam McDowell	2.87 (2.8714)	Cleveland Indians	8
Lew Krausse	2.99 (2.9887)	Kansas City Athletics	9
Earl Wilson	3.07 (3.0682)	Boston Red Sox	10
		Detroit Tigers
Dean Chance	3.08 (3.0847)	California Angels	11
Dave Boswell	3.14 (3.1358)	Minnesota Twins	12
Dave McNally	3.17 (3.1690)	Baltimore Orioles	13
Gary Bell	3.22 (3.2202)	Cleveland Indians	14
Mudcat Grant	3.25 (3.2530)	Minnesota Twins	15
Lee Stange	3.30 (3.2953)	Cleveland Indians	16
		Boston Red Sox
Fritz Peterson	3.31 (3.3070)	New York Yankees	17
George Brunet	3.31 (3.3113)	California Angels	18
Pete Richert	3.37 (3.3704)	Washington Senators	19
Jim Palmer	3.46 (3.4560)	Baltimore Orioles	20
Mike McCormick	3.46 (3.4583)	Washington Senators	21
Al Downing	3.56 (3.5550)	New York Yankees	22
Jose Santiago	3.66 (3.6628)	Boston Red Sox	23
Mel Stottlemyre	3.80 (3.8008)	New York Yankees	24
Jim Lonborg	3.86 (3.8642)	Boston Red Sox	25
Name	Earned Run Average	Team	Rank

	Did you know that more than forty players have worn the number twenty-five for the Boston Red Sox — including Jack Clark, Denny Galehouse, Dizzy Trout and Tony Conigliaro. Future Hall of Famer Sammy Sosa is best known for wearing number twenty-one; however, when the young slugger played for the Chicago White Sox (1989-1991) he only wore number twenty-five. The first player from the Angels franchise (they were the California Angels at the time) to wear the number twenty-five was Bob Perry.