Five things we learned in Week 1, No. 2

USC's out on spring break this week and not practicing, but each weekday through Friday, we'll bring you one thing we learned from the first three days of practice last week and what it might mean for the future.

Our first item covered Marqise Lee's continued progress. Second is this: The new-look Aundrey Walker is probably going to start, and it's probably going to be at right tackle.

Walker has lost at least 50 pounds over the last 14 months, and Lane Kiffin won't let anyone within earshot forget it.

Not that it'd be easy to forget -- Walker looks like a new man. The 6-6, 320-pounder says he feels "more alive" since losing the weight, and he can stay in for a series of plays during practice without appearing fatigued by the fourth or fifth.

He's good to go now, basically. With his combination of quickness, size and technique, he's worthy of a starting spot. But the question all offseason was whether he was going to be the left tackle for the Trojans in 2012 or the right, and, judging from the first week of practice, it's now safe to assume he's going to be the right.

He didn't play a snap on the left side. All the first-string snaps there went to Kevin Graf, who started on the right last season and did well in most of USC's games.

Graf has said he feels more comfortable on the left side as opposed to the right, which might be the biggest reason for Kiffin and offensive line coach James Cregg's decision to put him there. Another potential reason: Putting Walker on the right is less stressful. He'll get a chance to develop there next season and then scoot over to the left when Graf leaves, either after the 2012 or 2013 season.

The line would now appear set, with Graf-Marcus Martin-Khaled Holmes-John Martinez-Walker the likely formulation. But here's one other thing we've learned this spring: Martin's left guard spot might not be entirely secure.

Redshirt freshman Cyrus Hobbi spent some time with the first-team there last week. He did it because Martin had class, but he looked good doing it. That'll be a storyline to keep track of in the coming weeks.

Check back Wednesday for the third thing we noticed from the first week of USC spring practice.