Rourke (ribs) is questionable to return to Thursday night's contest against the Titans, Nick Wagoner of ESPN.com reports.
Rourke suffered an injury to his ribs in the first half, and his status for the remainder of the game is now up in the air. The second-year pro is competing with Adrian Martinez for the No. 3 quarterback role with San Francisco this season, and his chances to beat out Martinez would take a major hit if the injury sidelines him moving forward.