Injury updates

USC freshman linebacker Lamar Dawson sat out of practice Tuesday because of a sprained left ankle originally suffered late in the fourth quarter of the Trojans' 38-17 win over Syracuse last week.

Dawson, the backup to Chris Galippo at middle linebacker, wore a walking boot to practice Tuesday, just as he did when leaving the Coliseum on Saturday. He said he planned to play Saturday against Arizona State and is calling himself day-to-day for the time being.

In other injury news, senior defensive tackle DaJohn Harris sat out of practice because of an undisclosed ailment. He declined to tell reporters after practice what his injury was but said he'd be back shortly. Redshirt freshman receiver Kyle Prater also sat out of practice because of an undisclosed injury, and junior pass-catcher Brice Butler joined him on the sidelines late in the practice session as well.

Guard Martin Coleman, no longer wearing the shoulder sling that kept him out of practice last week, also sat out. Guard Abe Markowitz was limited -- he has not practiced fully since the week of the season opener.

Kiffin indicated that all six of the players could be ready to play by game-time Saturday. Harris has been a starter through three games and one of USC's most pleasant surprises thus far; Butler and Dawson are key reserves.

Of course, USC's injury list pales in comparison to that of Arizona State, who has lost four starters on its defense alone since spring practice. Coach Dennis Erickson announced Tuesday that talented defensive end Junior Onyeali has a torn meniscus and will miss the USC game and potentially the rest of the 2011 season. The Sun Devils will also be without end James Brooks, cornerback Omar Bolden and linebacker Brandon Magee.

Onyeali, listed at 5 feet 11, 245 pounds, was the Pac-10 defensive freshman of the year in 2010 after he posted 6.5 sacks in just five starts.