by: Brian K. Allen

(1) Sugar Ray Robinson – 173W 19L

http://en.wikipedia.org/wiki/Sugar_Ray_Robinson

(2) Rocky Marciano – 49W 0L

http://en.wikipedia.org/wiki/Rocky_Marciano

(3) Muhammad Ali – 56W 5L

http://en.wikipedia.org/wiki/Muhammad_Ali

(4) Floyd Mayweather – 46W 0L

http://en.wikipedia.org/wiki/Floyd_Mayweather,_Jr.

(5) Manny Pacquiao – 56W 5L 2D

http://en.wikipedia.org/wiki/Manny_Pacquiao