Guaranteeing something in the NFL, whether it is a victory or playoff berth, is a two-edged sword. It can either make you look like Nostradamus or like a complete idiot.
However, as a fan of sports, you love to hear the guarantee. It raises the stakes to a whole other level and forces us to be intrigued.
From Joe Namath guaranteeing a Super Bowl victory to Jim Fassel guaranteeing a playoff berth, here are the eight boldest guarantees in NFL history.