The National Football League will unleash a TV spot this weekend to encourage online voting on its Web site dedicated to the Super Bowl, NFL.com/SuperAd. The spot, a collaborative effort between NFL Films and BBDO, New York, is a spinoff of last year's NFL Super Bowl ad starring teammates Chester Pitts and Ephraim Salaam. The NFL is once again asking consumers to select their favorite player's life story, and the winning pitch will be used in an upcoming NFL Super Bowl ad. NFL.com/SuperAd currently features life stories of 210 players. The polls will remain open starting today through Dec. 17.