ALAMEDA -- Kyle Boller took at least the first two snaps with the Raiders first-team offense Friday morning, before the media window to practice closed. Wednesday and Thursday, Boller and newly-acquired Carson Palmer alternated, with Boller getting the first rep.
On the injury front, middle linebacker Rolando McClain (ankle) appeared to be sitting out practice for the third day in a row, and he looked to be joined by free safety Michael Huff (ankle) and placekicker Sebastian Janikowski (hamstring).
Rookie cornerback Chimdi Chekwa, meanwhile, ran onto the field late with helmet in hand. He has missed the last two games with a hamstring issue.
Also, special teams standout Rock Cartwright made his return to practice after missing last weeks Cleveland game with a strained calf.
Cornerback Chris Johnson (groinhamstring) was seen leaving the facility before practice, dragging his right leg, and defensive end Matt Shaughnessy (shoulder), who was placed on season-ending IR this week, was observed walking in with his right arm in a sling.
Fullback Marcel Reece was again working on a side field with a trainer.