That's Wilford Brimley, who was one of the co-stars of Ron Howard's movie Cocoon. I watched Cocoon on HBO in the 80's quite a bit when I was a wee one. I was born in 1982. Cocoon was released in 1985. For those who don't know, it's about a bunch of elderly people at a retirement home who - well you can look it up because it's sort of weird. But Brimley was one of the elderly people.
After seeing your image, I was thinking, man Brimley must have been ancient when he made these Diabeetus commercials. So I looked it up and realized that HE'S STILL ALIVE. WTF!
And what's more - I then noticed that he's only 85 years old today. He's not well into his hundreds like I thought. Which means...HE WAS ONLY FIFTY YEARS OLD WHEN HE FILMED COCOON!
Perspective: These three people were all the same age when these pictures were taken...