These freshmen set foot on campus this fall and have contributed immediately:

Adrian Peterson, Oklahoma: Prior to this season, no Sooner had ever opened his career by rushing for more than 100 yards in each of his first three games. Now, one has. Entering today's game against Texas Tech, Peterson is eighth in the nation in rushing at 133 yards per game.

Darius Walker, Notre Dame: His home-state program, Georgia, didn't want him. He didn't even play in his first college game, which the Fighting Irish lost to Brigham Young. But he secured his place in the lineup by running for 115 yards and two touchdowns against Michigan. He'll be a factor today against Purdue.

Calvin Johnson, Georgia Tech: If the Yellow Jackets have any hope of staying within shouting distance of Miami today, Johnson will be involved. The 6-foot-4, 225-pound receiver was the best player on the field when Tech beat Clemson, catching eight passes for 127 yards and three touchdowns, including the game-winner.

Erik Ainge, Tennessee: There was no bigger question for the Volunteers entering the season than who would play quarterback, and Ainge -- nephew of former Boston Celtic Danny Ainge -- has made orange-clad people feel better. He shares the job with another freshman, Brent Schaeffer, and has thrown eight touchdowns with one interceptions. The only quarterbacks with better efficiency ratings: Cal junior Aaron Rodgers, Purdue senior Kyle Orton and Utah junior Alex Smith.