Art Jimmerson, known to MMA fans as the one-gloved boxer from UFC 1, is now the boxing instructor at a UFC Gym.
From his interview with Ben Fowlkes of MMAFighting.com:
"The one glove, that was kind of a trick. I knew I was knocking cats out with fifteen-ounce gloves, so what am I going to do to someone with my bare hand? They had no idea who I was, so I wanted to wear the one glove so he'd think I wanted to hit him with that hand, but then I'd suck him in and hit him with the other, right? I told them I wanted to wear one glove and they were like, 'Fine, wear one glove.'"