Marvin Harrison, the rookie wide receiver for the Arizona Cardinals, was a limited participant in practice as he continues to progress through the concussion protocol. He suffered the concussion during a game against the Packers, and while this is a positive sign, he still has hurdles to clear before he can return to play against the Chargers. In a previous game against the Bills, Harrison expressed frustration over his performance, managing only one reception for four yards.

• Harrison is making progress in concussion protocol but is still not cleared to play.
• His performance in Week 1 was disappointing, reflecting the challenges faced by rookies.