One way to stay in the game after you've retired is to become a coach. Hopefully that means that you're coaching in the same league that you played in. If you used to play for the NFL, and now you coach peewee football, you might actually be in a movie and not in real life. Urban Meyer is a football player turned coach. He's coaching the Ohio Stat Buckeyes right now, but in the past he had coached the Florida Gators.
His daughter, Nicki Meyer, doesn't play football, but she has continued the family name in the line of sports. I guess it would be pretty difficult for her to continue the family name in football given that there is only one professional women's league and they don't even pay their players well, if at all.