A few notes from Tuesday's practice that won't make it into our other posts from the session:
Offensive tackles Kevin Graf and Aundrey Walker switched sides, with Walker working on the left and Graf working on the right for the first time this spring. For the first week, Graf stayed on the left and Walker stayed on the right, but Trojans coach Lane Kiffin said he felt it was time to try out the other way. We'll have more on this move Wednesday.
Injury updates: Center Khaled Holmes (calf), tight end Xavier Grimble (toe), running back Buck Allen (hamstring) and receiver George Farmer again missed practice after all missing the Saturday session before the break. We'll have more on Farmer later Tuesday.
Defensive back Josh Shaw (rib), a transfer from Florida, has not yet practiced this spring as he awaits word from the NCAA on his request for a hardship waiver to play this season, but Kiffin said the reason he's staying off the field is the rib injury, not his status with the NCAA.
Two players also went down with injuries during practice and were due to undergo tests afterward: safety Drew McAllister and linebacker Marquis Simmons. Simmons, who has had neck issues in the past, stood on the sideline with ice on shoulder for the second half of practice; McAllister hurt his hand and did not return.
Players who impressed Kiffin over the first week of practice after he re-watched the film over the break: defensive tackle George Uko, receivers Marqise Lee and Farmer, linebacker Hayes Pullard and cornerbacks Isiah Wiley and Brian Baucham.
Final notes: Kiffin said the Trojans had no off-field issues over the spring break, as far as he knew. The team took a week off before returning to meetings and conditioning on Monday...Tight end Junior Pomee missed practice because of a death in the family, Kiffin said...Lee and cornerbacks Nickell Robey and Tony Burnett are expected to participate in USC's Trojan Invitational track meet on Saturday morning before going to the Coliseum for the Trojans' 11 a.m. scrimmage.