Chiefs quarterback Matt Cassel has been ruled out for Sunday's game at Tampa Bay with a concussion, and Brady Quinn will start an NFL game for the first time since the 2009 season. Coach Romeo Crennel said Thursday that doctors have not cleared Cassel after he was hurt in the fourth quarter of a 9-6 loss to Baltimore last Sunday. Cassel has only spent a short period of time at the practice facility this week and it's unclear how long he might be out. ''We're trying to put the focus on preparing for Tampa Bay. We got a start on that yesterday,'' Crennel said. ''We're going to try to be competitive and give ourselves the best chance to win.'' Quinn, a former first-round draft pick of the Cleveland Browns, has been taking repetitions with the first team in practice this week. Ricky Stanzi will serve as the backup. Source: Associated Press
