You wouldn’t be blamed for overlooking it in favor of the bigger cards. Ahead of the major shows scheduled for July 19, on July 16, at Sydney’s Qudos Bank Arena, one fight card featured the return of rugby legend Sonny Bill Williams. The 40-year-old was part of the team that won the Rugby World Cup twice. But he’s also an avid boxer, holding a 9-2 professional record. Williams returned to the ring nearly three years after his loss to kickboxing legend Mark Hunt. Stories like these are rare. Athletes from other disciplines are choosing the rigor and discipline of boxing. Still, there are a few other shining examples.

Back in the United States, several NBA and NFL legends developed a strong interest in the sweet science. They may not have reached the highest levels in boxing. Still, their s

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