The Broncos brought in quarterback Brady Quinn to challenge Kyle Orton for the starting job. Instead, he may be in competition with rookie Tim Tebow for the backup job. Quinn looked confused at times in coach Josh McDaniels' complicated system during the preseason opener Sunday night at Cincinnati. "Obviously, I could've done some things better here and there," Quinn said. "But that's why we come out here to practice, that's why we're working on it. ... Things are never always as bad as they look and never as good as they look on film." Orton looked comfortable in the system he played in last season and Tebow looked to have a better grasp of the system as well.