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
