Can I play as a reciever in Madden 10?

This has been bugging me. There is a trophy that says "Make 10 user catches with L. Fitzgerald", which is a good one. But how do I become the reciever to run my route? I press B before I snap the ball, and make my hud say L. Fitzgeral, but as soon as I hit X for my QB to snap the ball, I become the QB again. Please help, thankyou!