It’s safe to say that the fellow described in this ESPN.com article is not your typical 59-year old:

Mike Flynt was drinking beer and swapping stories with some old football buddies a few months ago when he brought up the biggest regret of his life: getting kicked off the college team before his senior year.
So, one of his pals said, why not do something about it?
Most 59-year-olds would have laughed. Flynt’s only concern was if he was eligible.
Finding out he was, Flynt returned to Sul Ross State this month, 37 years after he left and six years before he goes on Medicare. His comeback peaked Wednesday with the coach saying he’s made the Division III team’s roster. He could be in action as soon as Sept. 1. [. . .]
A longtime strength and conditioning coach at Nebraska, Oregon and Texas A&M, he’s spent the last several years selling the Powerbase training system he invented. Clients include school systems and the military. His colorful life story includes being the son of a Battle of the Bulge survivor and having dabbled in gold mines and oil wells — successfully. [. . .]
Flynt’s position is still being determined, but he used to play linebacker. Wherever he lines up, he’ll likely become the oldest player in college football history. Neither the NCAA or NAIA keeps such a statistic, but research hasn’t turned up anyone older than their mid-40s. And even those are rare, for obvious reasons. [. . .]
. . . his wife wasn’t as fired up by the idea.
“I feel like I’m married to Peter Pan,” she said. . .