Go to the "My Madden" option from the Main Menu. Then, choose the "Madden Codes" section from the "Madden Cards" screen and enter any of the following codes.

Password - Effect
5LAWO0 - Lame Duck Card: Your opponent will be forced to throw lob passes for one half.

XL7SP1 - Mistake Free Card: It will be impossible to throw an interception or fumble the ball.

WROA0R - QB on Target card: Your Quarterback will have 100% accuracy for one half.