AFC or NFC preseason teams:
Press Y, B, Y, B, Y, B at the copyright screen, then select the "Preseason" option. Note: This code may not be used with another code.

Unlimited turbo runs:
Press B, Y, A(2), Y, Start at the copyright screen. Note: This code may not be used with another code.

More fumbles:
Press A, Y, B, A, Y, B at the copyright screen. Note: This code may not be used with another code.

"No Rough Stuff" rule:
Press B, Y, Start(3) at the copyright screen. Note: This code may not be used with another code.