The Freshman 15: Green-Beckham headlines instant-impact first years

Your Freshman 15 probably crept up on you. That sort of thing happens when a young person gets thrown into an environment with little adult supervision and around-the-clock availability of 16-inch diameter hunks of cardboard with minimal cheese and sauce for less than $5.

The members of SI.com's Freshman 15 probably will not need months to get noticed. By spring break, when their fellow freshmen will try furiously to lose the pounds packed on during football season, these guys could be household names on their campuses.

• WR Nelson Agholor, USC: With George Farmer recovering from a hamstring injury, the No. 3 receiver job behind Robert Woods and Marqise Lee is open. Veteran De'Von Flournoy is an option, but so is Agholor. The 6-foot-1, 185-pound native of Nigeria, who moved to the United States at age 5 and played his high school ball in Tampa, Fla., plays an awful lot like Woods, which bodes well for USC in 2012 and in the future.

• DE Arik Armstead, Oregon: The Ducks already have a feared pass rusher in 6-7, 241-pound senior Dion Jordan, but they hope another defensive end with a power forward's frame will chase Pac-12 quarterbacks this season. Armstead is 6-8 and 290 pounds, so he could be especially potent at end when the Ducks use a 3-4 look. Given Ducks defensive coordinator Nick Aliotti's affinity for hockey-style line changes on his defense, expect Armstead to log plenty of snaps as a freshman even if he doesn't start.

Read more: http://sportsillustrated.cnn.com/2012/writers/andy_staples/08/09/2012-impact-freshmen/index.html#ixzz23AOgNpFP