NFL 2K1 Cheat Codes for Dreamcast

Auto-offense play selection
At the play selection screen when on offense, press A(2) to have the CPU pick the most effective play.

Auto-defense play selection
At the play selection screen when on defense, press A(2) to have the CPU pick the best play to stop your opponent. However, do not press A(2) on 4th down, because the CPU will not select a punt return, or field goal defensive play.

Block a punt or field goal
This cheat works when in two player mode or on the network. To block a punt or field goal, simply push Y at the play selection screen when you are certain that your opponent is going to punt or field goal. This should bring up audibules screen. Right before the snap, push Y+B and your players will start to dance. After this, Speed up at the snap and push Y to block the kick.
submitted by: sam

Hide play:
When you are going to pick your play, move over it and hold A. Then, find another play and release the button.

Win coin toss:
Repeatedly press B at the coin toss, after the side has been called (heads/tails).

Player names announced:
The game will announce real player names under some conditions. For example, when playing as the Redskins, use "A. Redskins LB #56" in a tackle or sack (if possible to intercept a pass). The stadium announcer will say sack, tackle, or interception by Lavar Arrington. Go to options, then "Presentation", and turn up the stadium announcer volume to hear it better. Note: Players identified with A. (position) and a number may be the only ones that this may be done on.