Sam Darnold threw for 352 yards and three touchdowns
Clay Helton doesn't have much time left at USC.
The Pittsburgh Steelers became a dynasty after winning back-to-back Super Bowls. Led by receiver Lynn Swann's 161 yards and the "Steel Curtain" defense, Pittsburgh defeated the Dallas Cowboys, 21-17.
From the Immaculate Reception to David Tyree's catch, here's a look at some of the most memorable plays in league history.