-You can block a punt as long as it is against an opponent. Select "Punt Block" if you are sure your opponent is going to punt the ball. Then, take the cornerback on the weak side and get as close to the line of scrimmage as you can without going over. Watch your opponent's meter, and as soon as you think he will stop it, sprint across the line and just run directly into the punter. Avoid attempting a big hit unless you want a fumble because you might miss him.
-Choose "Punt Block". The CPU will audible to bring in blockers. Take the fastest man from left side and bring him to the right so that he is the last man on the line of scrimmage. Just as the last man is about to be set on the CPU's team, come from right off the line of scrimmage and avoid blockers by running straight down then hit the punter. Note: You may want to try this at 4th and 6 or longer so a 5 yard flag will not give them a first down.