Chiefs quarterback Matt Cassel could be lost for the season with what his coach calls a significant injury to his throwing hand. Kansas City coach Todd Haley refused to say Monday whether the team had discussed putting Cassel on injured reserve, but he did say "it's a possibility" when asked whether Cassel would be done for the year. "He will probably have to have surgery at some time," Haley said. "The length of it, we're not sure, but there's some optimism. Each person it varies, but it's a difficult injury."