Robison had the surgery Tuesday. Coach Brad Childress said Wednesday it was possible Robison could play this weekend in Detroit.
On Friday, Childress said Robison was "doing much, much, much better," but he was ruled out for the game. The loss isn't as devastating as it could have been because a federal judge blocked the suspensions of star tackles Kevin and Pat Williams, clearing them to play on Sunday.
Starting right tackle Artis Hicks is listed as questionable with an elbow injury. Backup tight end Garrett Mills also is questionable with an ankle injury.
Copyright 2008 by The Associated Press