Luepke (concussion) has been ruled out for the rest of Sunday night's contest against the Vikings, Todd Archer of ESPN.com reports.
Luepke suffered a concussion during Sunday Night Football, bringing his night to a premature end. The Cowboys will have to operate without a fullback for the remainder of the game. He saw a season-high five touches prior to being ruled out, turning the volume into 30 scrimmage yards.