When you play against any computer opponent, run the QUICK HITS play. It is the first square button play under Goal Line. When you snap the ball, run to your right a few steps, then throw the ball to the L1 reciever, who is running straight out to the left. After you cacth the ball, run as far as you can, and try to stiffarm (L2) people to get more yardage. (Sometimes the reciever might have to dive for the ball, and he may get tackled)
Roster Tip
To get all of your created players onto your franchise roster for free, you need to create and set the roster in exhibition mode first and then create your franchise. Otherwise you will have to buy your created players to get them onto the franchise roster later.