The Browns listed Jake Delhomme as doubtful because of an ankle injury. But Kansas City coach Todd Haley said his team isn?t taking chances. The Chiefs prepared this week for Delhomme, a traditional drop-back passer, and the more mobile Seneca Wallace, a former Iowa State star who would start if Delhomme were unavailable. Haley said that it requires more work to get ready for two quarterbacks but that it?s necessary to cover all possibilities. ?Whenever that occurs, it?s always a problem,? Haley said. ?It?s always a bigger problem than knowing who it is.?