
Here's the TV lifeguard back in his '90s heyday (left) -- and the 58-year-old on the set of "Piranha 3DD" in North Carolina on Friday (right).
Someone's been laying off the cheeseburgers.

he's a known drinker and how many drinkers have flat stomachs?
shocking that so many people are so clueless; of course he's had surgical intervention.
If you are going to put 'good genes' or 'good docs' can you also put 'neither.' Because that's the button I'd choose.
Neither, he aged terribly. That is just a publicity photo with a lot of makeup. Otherwise he's aged a lot worse than he should have because of his alcohol problems.
I'm surprised the poll is pretty much split 50/50. If you look at the picture on the left, he looks natural and young. Then you look at the picture on the right and it looks like some invisible hands are pulling his face back to the point where he almost has Asian eyes lol -- he kinda looks like a alien.
Jeez, almost 60 and a raging alcoholic. How is he allowed to look that? Even with surgery, not fair.
Wow. A bunch of haters.
For a 60-year-old drunk, he looks damn good. Surgical help or not...
Britney Spears might miss a lot more 'X Factor' auditions ... because she can! Simon Cowell gave Brit damn near free reign in order to sign the pop star to that $15 million deal -- but is it backfiring? We'll tell you what peeps on the set are saying.Plus, Chris Jericho's…