Marvin Hagler is a US$45 million net-worth former professional boxer in the United States. In fact, he was also the undisputed middleweight champion between 1980 and 1987. For that, his reign for such an achievement was the second-longest within the last century. Moreover, Marvin Hagler is also listed in the International Boxing Hall of Fame as well as the World Boxing Hall of Fame. In the 1980s, Marvin Hagler was also named the Fighter of the Decade by Boxing Illustrated Magazine. The Ring Magazine and the Boxing Writers Association of America (BWAA) also named him the Fighter of the Year for two times. One fun fact about Marvin Hagler was that due to the fact that the announcers like to refer him by his nickname “Marvelous”, he decided to officially change his name to Marvelous Marvin Hagler in 1982.