Mike Tyson Declares "I'm Back" In Workout

It looks like boxer Mike Tyson is back. At least that’s what he’s declaring. The former heavyweight champ posted a recent workout video on Instagram. The 21-second clip shows him throwing power punches with his trainer. He then turns to the camera and says “I’m back.” But the 53-year-old’s rep says he’s simply staying in shape and has no matches lined up.

Would you want to spar with this?…