The Dallas Cowboys ruled out starting running back DeMarco Murray for Sunday's game against the New York Giants, ESPN Dallas reported Friday. He has a sprained foot. Murray's backup, Felix Jones, is questionable with a bruised knee. He was limited in Friday's practice. If Jones cannot start, Phillip Tanner will replace him. Outside linebacker DeMarcus Ware missed his third straight practice with an illness but he is expected to play. He is listed as probable. Outside linebacker Anthony Spencer (pectoral) and center Ryan Cook (hamstring) are probable while center Phil Costa (ankle), safety Matt Johnson (hamstring) and defensive end Sean Lissemore (ankle) have been ruled out.