Buchanon was suspended Sept. 2 for violating the NFL's policy on performing-enhancing substances. He played in only one preseason game, the finale against the Tampa Bay Buccaneers, but left in the second quarter with a right shoulder injury.
Buchanon, who's in his ninth NFL season, re-signed with the Redskins after the NFL lockout ended in late July. He's expected to be the team's third cornerback. In Buchanon's absence, that role has been filled by Kevin Barnes, who has recorded six tackles and one interception.