Nam Y. Huh, File, Associated Press
FILE - In this Sept. 1, 2011, file photo, Cleveland Browns quarterback Seneca Wallace (6) drops back to pass against the Chicago Bears in the first half an NFL preseason football game in Chicago. With Colt McCoy still experiencing headaches and not practicing from a concussion suffered in Pittsburgh last week, Wallace, who has spent most of his NFL career as an understudy, will could start when the Browns visit the Arizona Cardinals.

BEREA, Ohio — Browns quarterback Colt McCoy has been sent home for the fourth time this week as he continues to recover from a concussion.

McCoy was seen leaving the team's facility on Friday in his pickup truck shortly before the Browns practiced. With McCoy still sidelined from the hit by Pittsburgh's James Harrison, backup Seneca Wallace will make his first start this season on Sunday in Arizona. Wallace went 1-3 in four starts for the Browns (4-9) last season.

Browns coach Pat Shurmur will provide an update on McCoy following practice.

Tight end Benjamin Watson is not practicing after suffering his third concussion of the season last week against the Steelers. Watson, who was wobbled after hitting his head on the ground during a tackle, visited a specialist this week. The team may put him on injured reserve.