Mike Tyson says he's seriously considering a rematch with Evander Holyfield -- but only because it would raise MILLIONS for people in need.
"That would be awesome for charity," Tyson said on "TMZ Live" ... Can you imagine me and him going in the ring together?"
Of course, 53-year-old Tyson has been training like a maniac recently and looks absolutely terrifying -- something he credits to the stem cell treatments he's been receiving.
"I'm in good shape, I feel really good!"
Now, with 57-year-old Holyfield also training for a comeback -- we asked if there's truth to the rumors they're planning on running it back for a 3rd time.