At the main menu, select My Madden and then select Madden Cards. At the Madden Cards menu, select the Madden Codes option. Enter the following codes to unlock the corresponding cheats. If you entered the code correctly, you'll see a confirming message onscreen.
The passwords are case-sensitive.

1st and 15: 2W4P9T
1st and 5: 2Y7L8B
3rd Down: 3F9G4J
5th Down: 3E9R4V
Da Boot: 3J3S9Y
Donovan McNabb Gold Card: 8Q2J2X
Extra Credit: 3D3Q3P
Human Plow: 3H3U7F
Super Dive: 3H8M5U
Tight Fit: 3D8X6T
Unforced Errors: 2Z2F4H