1963 On Base Percentage Leaders Top 25 in the National League
Name	On Base Percentage	Team	Rank
Eddie Mathews	.399 (.39852)	Milwaukee Braves	1
Hank Aaron	.391 (.39076)	Milwaukee Braves	2
Willie Mays	.380 (.38003)	San Francisco Giants	3
Frank Robinson	.379 (.37931)	Cincinnati Reds	4
Dick Groat	.377 (.37733)	St. Louis Cardinals	5
Tony Gonzalez	.372 (.37198)	Philadelphia Phillies	6
Orlando Cepeda	.366 (.36566)	San Francisco Giants	7
Bill White	.360 (.36022)	St. Louis Cardinals	8
Tommy Davis	.359 (.35906)	Los Angeles Dodgers	9
Ken Boyer	.358 (.35786)	St. Louis Cardinals	10
Billy Williams	.358 (.35766)	Chicago Cubs	11
Roberto Clemente	.356 (.35580)	Pittsburgh Pirates	12
Maury Wills	.355 (.35478)	Los Angeles Dodgers	13
Jim Gilliam	.354 (.35413)	Los Angeles Dodgers	14
Willie McCovey	.350 (.34984)	San Francisco Giants	15
Joe Torre	.350 (.34955)	Milwaukee Braves	16
Ron Fairly	.347 (.34720)	Los Angeles Dodgers	17
Vada Pinson	.347 (.34676)	Cincinnati Reds	18
Curt Flood	.345 (.34463)	St. Louis Cardinals	19
Ron Santo	.339 (.33916)	Chicago Cubs	20
George Altman	.339 (.33911)	St. Louis Cardinals	21
Johnny Callison	.339 (.33873)	Philadelphia Phillies	22
Ron Hunt	.334 (.33446)	New York Mets	23
Pete Rose	.334 (.33382)	Cincinnati Reds	24
Dick Schofield	.333 (.33333)	Pittsburgh Pirates	25
Name	On Base 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.