NFL 2K1

Auto-offense play selection 
At the play selection screen when on offense, press A, A 
to have the CPU pick the most effective play.

Auto-defense play selection 
At the play selection screen when on defense, press A, A 
to have the CPU pick the best play to stop your opponent. 

Note: Do not use this on 4th down, because the CPU will not 
select a punt return, or field goal defensive play.