Possible Clues:

• '80s title holder
• Major supplier to KFC
• World heavyweight boxing champion, b. 1966
• Boxer with a cameo in 'The Hangover'
• Boxer Mike who wrote "Iron Ambition"
• 'Iron Mike' of the ring
• 'Space Chronicles: Facing the Ultimate Frontier' author Neil deGrasse ___
• Boxer beginning to train young lad
• Mike ____, the boxer who bit off a piece of Evander Holyfield’s ear during a 1997 fight
• Undisputed world heavyweight champion, 1987