Detroit Lions quarterback Matthew Stafford stands on the sidelines after being injured during an NFL football game against the Chicago Bears on Sunday, Sept. 12, 2010, in Chicago. Stafford left the game with a right shoulder injury following a blindside sack by the Bears' Julius Peppers. (AP Photo/The Detroit News, Daniel Mears)

Photo by: Daniel Mears

Detroit Lions quarterback Matthew Stafford stands on the sidelines after being injured during an NFL football game against the Chicago Bears on Sunday, Sept. 12, 2010, in Chicago. Stafford left the game with a right shoulder injury following a blindside sack by the Bears' Julius Peppers. (AP Photo/The Detroit News, Daniel Mears)