13. Marvin Hagler

Net Worth: $45 Million
Marvin Hagler is an American former professional boxer who competed from 1973 to 1987. Hagler resigned as the middleweight champion from 1980 to 1987. He also held the second longest unified championship reign in boxing history.
As of 2019, Marvin Hagler’s net worth is estimated to be roughly $45 million dollars, making him the 13th richest boxer in the world.