1966 Winning Percentage Leaders Top 25 in the American League
Name	Winning Percentage	Team	Rank
Dave Boswell	.706 (.70588)	Minnesota Twins	1
Dave McNally	.684 (.68421)	Baltimore Orioles	2
Sonny Siebert	.667 (.66667)	Cleveland Indians	3
Jim Kaat	.658 (.65789)	Minnesota Twins	4
Earl Wilson	.621 (.62069)	Boston Red Sox	5
		Detroit Tigers
Jim Perry	.611 (.61111)	Minnesota Twins	6
Lew Krausse	.609 (.60870)	Kansas City Athletics	7
Jim Palmer	.600 (.60000)	Baltimore Orioles	8
Denny McLain	.588 (.58824)	Detroit Tigers	9
Steve Hargan	.565 (.56522)	Cleveland Indians	10
Tommy John	.560 (.56000)	Chicago White Sox	11
Gary Peters	.545 (.54545)	Chicago White Sox	12
Sam McDowell	.529 (.52941)	Cleveland Indians	13
Fritz Peterson	.522 (.52174)	New York Yankees	14
George Brunet	.500 (.50000)	California Angels	15
Mudcat Grant	.500 (.50000)	Minnesota Twins
Mickey Lolich	.500 (.50000)	Detroit Tigers
Jim Lonborg	.500 (.50000)	Boston Red Sox
Phil Ortega	.500 (.50000)	Washington Senators
Pete Richert	.500 (.50000)	Washington Senators
Fred Talbot	.500 (.50000)	Kansas City Athletics
		New York Yankees
Gary Bell	.483 (.48276)	Cleveland Indians	22
Jose Santiago	.480 (.48000)	Boston Red Sox	23
Al Downing	.476 (.47619)	New York Yankees	24
Lee Stange	.471 (.47059)	Cleveland Indians	25
		Boston Red Sox
Name	Winning Percentage	Team	Rank

	Jim Thome wore number twenty-five since he first came up with the Cleveland Indians making him the franchise record holder for that particular number (Mike Garcia is second). The first player from the Angels franchise (they were the California Angels at the time) to wear the number twenty-five was Bob Perry. 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.