Heavyweight rapper 50 Cent may punch up boxing ring

50 Cent may have fought his way back from being shot in the face and dealing crack to become one of the world's best-known rappers, but the 36-year-old's apparently still got some fight left in him. Boxing champ Floyd Mayweather Jr. told the media Wednesday that his pal is ready to get into the boxing-promotion business and might even put on the gloves himself for a future pay-per-view bout. This development shouldn't come as a total surprise. 50 Cent actually fought as a kid, even competing in the Junior Olympics. So don't mess with him -- or he might write a song about you.