Brett Favre is a 40-year-old quarterback and could return to the NFL for his 20th professional season.
But that's not the kicker.
While anything in the mid-30s seems old by today's professional football standards, Favre is about to feel even older, after his daughter, Brittany Nicole, recently gave birth to her first child, according to an Adam Schefter Twitter post.
It's believed that Favre — should he decide to suit up for the 2010 season — will be the NFL's first active grandfather.
