Boxer/biker Michael ‘Slick’ Anderson rides to the tune of his own engine

NEWARK, N.J. — Michael Anderson is an anomaly in many ways. It isn’t common to see boxers continuing to compete over the age of 40, especially in his home state of New Jersey, which demands more extensive medical requirements for older boxers to get licensed.

But for the 43-year-old known as “Slick,” he can look at himself in the mirror and tell that he still has more to give. After all, in the 24 years that he’s been competing, he says he has only had a busted nose twice. When asked why he doesn’t transition to life after boxing...