Marvin Harrison, the rookie wide receiver for the Arizona Cardinals, has made significant progress in his recovery from a concussion, participating fully in practice ahead of the upcoming game against the Chargers. Despite a frustrating debut in Week 1, where he struggled to make an impact, Harrison's potential remains high as he continues to adjust to the NFL.

• Marvin Harrison has progressed from a concussion to full practice participation.
• His Week 1 performance was underwhelming, but he has the support of his quarterback.