Bills quarterback Thad Lewis is doubtful for Sunday's game against the Kansas City Chiefs due to a rib injury. Lewis returned to practice on Friday on a limited basis. ''It's a point of the soreness of the ribs, really just being able to turn and throw and that's the one thing that's holding him back,'' Bills coach Doug Marrone said. If Lewis is unable to play, the Bills (3-5) will start either undrafted rookie Jeff Tuel or the recently signed Matt Flynn. More...