I've seen him in pizza commercials (can't remember if it was Papa John's, Pizza Hut, or Domino's), The General, and Gold Bond.
The dude's making the most of his retirement, I guess.
I just looked up his wikipedia page, and it looks like the implication is he won 3 national championships in preperation for Space Jam, then made Space Jam, and went back to basketball for a few more Championships.
The joke still works!