Chiefs quarterback Tyler Thigpen isn't OK with his demotion to backup quarterback after the acquistion of Matt Cassel, and hopes he'll get a chance to start. "It's life," Thigpen said Sunday. "Everything happens for a reason. You may not see the reason right now, but I know there?s a reason that they brought a guy in like Matt. "I'm behind him, and all I'm doing is pushing him, making him better. Hopefully me doing that is going to make this team better."