FILE - This Oct. 31, 2010, file photo shows Washington Redskins quarterback Donovan McNabb on from the sidelines after being benched during the fourth quarter of an NFL football game against the Detroit Lions, in Detroit. A person with knowledge of the situation says the Redskins plan to start Rex Grossman at quarterback over McNabb on Sunday, against the Dallas Cowboys. The person spoke to The Associated Press on condition of anonymity on Friday, Dec. 17, 2010,  because coach Mike Shanahan had yet to announce the switch. (AP Photo/Paul Sancya, File)

Photo by: Paul Sancya

FILE - This Oct. 31, 2010, file photo shows Washington Redskins quarterback Donovan McNabb on from the sidelines after being benched during the fourth quarter of an NFL football game against the Detroit Lions, in Detroit. A person with knowledge of the situation says the Redskins plan to start Rex Grossman at quarterback over McNabb on Sunday, against the Dallas Cowboys. The person spoke to The Associated Press on condition of anonymity on Friday, Dec. 17, 2010, because coach Mike Shanahan had yet to announce the switch. (AP Photo/Paul Sancya, File)