It's been said that losing your hair and falling asleep in front of the TV are telltale signs you've gotten old, but how about your favorite childhood quarterback becoming a national spokesman for the AARP?

If you grew up cheering Dan Marino and his touchdown passes, you're going to feel a little bit older after reading this story. Marino was just introduced as spokesman for the American Association of Retired Persons.

The former Dolphins quarterback is officially the AARP's "Men's Life Ambassador." In other words, Marino will give his knowledge on everything from men's health, fitness, sports, lifestyle, aging and more, to members of the organization.

Marino, currently an NFL studio analyst for CBS, said he plans to "create awareness and when you turn 50 there’s new challenges and things you can do. It's not the end."

Inducted into the Pro Football Hall of Fame in 2005, Marino played for the Dolphins from 1983 to 1999. One of the greatest regular-season quarterbacks of all time, he often struggled in the playoffs, never winning a Super Bowl and finishing with a losing postseason record (8-10).

Over the years Marino has made numerous pop culture appearances. Everything from movie roles in the 1994 comedy "Ace Ventura: Pet Detective" to guest-starring in "The Simpsons" on Fox. He's also done a number of commercial endorsements, most notably for Isotoner gloves.

Dan and his wife, Claire, have six children, and they run the Dan Marino Foundation, which advocates for families dealing with autism. Marino, who celebrated his 50th birthday last year, picked up his AARP card a few days after in a big ceremony that included his CBS colleague James Brown.

AARP is massive, with more than 39 million members. The nation's largest membership organization for the 50-plus crowd has offices in all 50 states, the District of Columbia, Puerto Rico and the U.S. Virgin Islands.

-- Follow Ben Maller on Twitter @BenMaller.

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