Can't remember where I read it, but he had his caloric intake increased, and has done a whole bunch of compound exercises to increase his body mass. Check out his thighs in the picture on the last page with that girl!
I met magic johnson a few times through his family, he's really warm & friendly, and a lot smarter than one may think. Business savvy too. I know i'm bragging. Funny thing, I know next to nothing of basketball