Pipino Cuevas... he looked like a deadly serious grown man, not a teenager or 20-year-old which he was in his heyday.
Norton was for most of the decade. Cuevas for me. Looked like some Spaghetti Western bad guy when he was in his teens.
Tony Ayala Jr. in his comeback. Marvin Johnson, Earnie Shavers and Evander Holyfield before they shaved their heads. Tommy Morrison aged rapidly after his HIV diagnosis. There's an awful court video of him somewhere where he looks like a haggard 60 something and he was in his 40's at the time.
Whyte is aged ten years in six months...his hook in the last two fights looked switched off. Maybe due to the long wait to face Wilder and now Fury.
Well shaving your head bald and gaining like 40 lbs of fat can definitely make you look older. He has no excuse getting that big being in his prime and a #1 contender demanding his title shot, what is he gonna do if he does finally get his shot? He won't be in shape to fight and no one will want to hear his excuses for his poor performances. All that hot dog chomping and beer guzzling. Plus a lot of guys lose their hair even in their mid 20's, it's genetic.