2003 On Base Percentage Leaders Top 25 in the American League
Name	On Base Percentage	Team	Rank
Manny Ramirez	.427 (.42710)	Boston Red Sox	1
Carlos Delgado	.426 (.42553)	Toronto Blue Jays	2
Jason Giambi	.412 (.41159)	New York Yankees	3
Edgar Martinez	.406 (.40630)	Seattle Mariners	4
Jorge Posada	.405 (.40476)	New York Yankees	5
Bill Mueller	.398 (.39765)	Boston Red Sox	6
Trot Nixon	.396 (.39648)	Boston Red Sox	7
Alex Rodriguez	.396 (.39580)	Texas Rangers	8
Doug Mientkiewicz	.393 (.39336)	Minnesota Twins	9
Derek Jeter	.393 (.39332)	New York Yankees	10
Corey Koskie	.393 (.39324)	Minnesota Twins	11
Frank Thomas	.390 (.38973)	Chicago White Sox	12
Carlos Beltran	.389 (.38870)	Kansas City Royals	13
Magglio Ordonez	.380 (.37982)	Chicago White Sox	14
Erubiel Durazo	.374 (.37364)	Oakland Athletics	15
Tim Salmon	.374 (.37359)	Anaheim Angels	16
John Olerud	.372 (.37184)	Seattle Mariners	17
Dmitri Young	.372 (.37165)	Detroit Tigers	18
David Ortiz	.369 (.36935)	Boston Red Sox	19
Aubrey Huff	.367 (.36686)	Tampa Bay Devil Rays	20
Bernie Williams	.367 (.36660)	New York Yankees	21
Bret Boone	.366 (.36648)	Seattle Mariners	22
Carl Everett	.366 (.36622)	Texas Rangers	23
		Chicago White Sox
Shannon Stewart	.364 (.36449)	Toronto Blue Jays	24
		Minnesota Twins
A.J. Pierzynski	.360 (.35970)	Minnesota Twins	25
Name	On Base 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). 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. Jose Cruz of the Houston Astros had his number twenty-five retired on October 3, 1992, and became the first Major League player with that particular retired number.