George Foreman, 72

Older boxing fans might be familiar with George Foreman, with the professional athlete winning numerous bouts throughout his career, 76 to be exact. The athlete was prolific when in the ring, and it seems his proficiency didn’t end with the sport when he retired in 1997, as he is thriving in both personal and business life.

Away from boxing, ‘Big George’ is an ordained Christian minister and a shrewd businessman who sold the commercial rights to the ‘George Foreman Grill’ for a whopping $138 million. As such, the author is among the wealthiest athletes in the world and uses his riches to reach out to society, building a youth center in Houston.