1939 Winning Percentage Leaders Top 25 in the American League
Name	Winning Percentage	Team	Rank
Atley Donald	.813 (.81250)	New York Yankees	1
Lefty Grove	.789 (.78947)	Boston Red Sox	2
Red Ruffing	.750 (.75000)	New York Yankees	3
Bob Feller	.727 (.72727)	Cleveland Indians	4
Dutch Leonard	.714 (.71429)	Washington Senators	5
Tommy Bridges	.708 (.70833)	Detroit Tigers	6
Ted Lyons	.700 (.70000)	Chicago White Sox	7
Bump Hadley	.667 (.66667)	New York Yankees	8
Johnny Rigney	.652 (.65217)	Chicago White Sox	9
Bobo Newsom	.645 (.64516)	St. Louis Browns	10
		Detroit Tigers
Mel Harder	.625 (.62500)	Cleveland Indians	11
Fritz Ostermueller	.611 (.61111)	Boston Red Sox	12
Lefty Gomez	.600 (.60000)	New York Yankees	13
Thornton Lee	.577 (.57692)	Chicago White Sox	14
Johnny Allen	.563 (.56250)	Cleveland Indians	15
Al Milnar	.538 (.53846)	Cleveland Indians	16
Jack Wilson	.500 (.50000)	Boston Red Sox	17
Eddie Smith	.476 (.47619)	Philadelphia Athletics	18
		Chicago White Sox
Dizzy Trout	.474 (.47368)	Detroit Tigers	19
Schoolboy Rowe	.455 (.45455)	Detroit Tigers	20
Lynn Nelson	.435 (.43478)	Philadelphia Athletics	21
Joe Haynes	.400 (.40000)	Washington Senators	22
Nels Potter	.400 (.40000)	Philadelphia Athletics
Joe Krakauskas	.393 (.39286)	Washington Senators	24
Bill Beckmann	.389 (.38889)	Philadelphia Athletics	25
Name	Winning Percentage	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. 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.