On Sunday, football fans tuning in for the Super Bowl matchup between the Seattle Seahawks and New England Patriots will also get a first look at an ad featuring a well-known professional boxer.

Well, here’s a bombshell that nobody saw coming—except maybe those who’ve been paying attention to boxing’s not-so-secret relationship with painkillers. Mike Tyson, the man who once proclaimed he’d ...

LAS VEGAS — When Mike Tyson was developing as a young fighter in New York in 1980s, he had plenty of chances to test the skills that would one day make him the world’s best and fiercest heavyweight.