Kubiak: Matt Schaub’s our starting quarterback

Case Keenum handled his first NFL start fairly well for the Texans on Sunday. Against a very good Chiefs defense, Keenum completed 15-of-25 passes for 271 yards and a touchdown in a 17-16 loss that dropped the Texans to 2-5 this season. That was good enough for a quarterback rating of 110.6, better than any…