While on defense, if you and the offensive player with the ball are charging each other, press C at the correct moment and he will fumble the ball. Note: This rarely happens.
Humongo Dome
Win the Backyard Bowl.
Jason Taylor
Get five sacks in a game with one player.
Larry Johnson
Get Five rushing TDs in one game by one player.
No catches
While on defense, if the offense throws a far ball, become the defender that is guarding the receiver. Push or run into the receiver and it will result in an incomplete pass.