A few notes that won't make it into our other coverage from Thursday's session:
USC coach Lane Kiffin spotlighted safety T.J. McDonald for his improved play in the second week of the spring and also said defensive tackle George Uko has practiced well aside from an effort slip-up during the Trojans' first scrimmage. We'll have more on Uko's situation on Friday.
Cornerback Nickell Robey, receiver Marqise Lee and defensive back Tony Burnett will participate in Saturday's Trojan Invitational track meet instead of scrimmaging with the USC team at the Coliseum. Running back D.J. Morgan, the other football-track participant this spring, will scrimmage instead of sprint. We'll have more on the foursome and their decisions on Friday.
Defensive back Josh Shaw, a Florida transfer, said he will not practice for the rest of spring with a rib injury he suffered with the Gators. He participated in winter workouts for the Trojans earlier this year but had the situation flare up over the last few weeks, he said. Shaw also still awaits ruling from the NCAA on whether or not he'll be able to play this season with a hardship waiver.
Injury report: Outside of the four Trojans sidelined with hamstring injuries, tight end Xavier Grimble (toe) and center Khaled Holmes (calf) also sat out of practice. Linebacker Marquis Simmons (shoulder) was very limited and quarterback Jesse Scroggins was limited with a hip injury. Safety Drew McAllister, who left Tuesday's practice early with a hand injury, practiced with a cast on his hand.
Final notes: USC will scrimmage at 11 a.m. on Saturday in the Coliseum, the first time the Trojans will go back to the stadium as a team since November's 50-0 season-ending win over UCLA...Kiffin said quarterback Matt Barkley "won't play a lot" in the scrimmage, giving way primarily to backup candidates Cody Kessler and Max Wittek...Tight end Junior Pomee missed his second consecutive practice with a death in the family but could be back for Saturday's scrimmage.