I did this in RTG with UGA. Easiest way would to probably pick Bama and play against a crappy team like FIU or NIU. Just line up and run the ball with Ingram the whole game. He's a 99 so he'll break a few tackles and you should get it pretty quickly. You could also use the Goalline formation too. The achievement popped for me after the TD so I just simulated the rest of the game.