IRVING, Texas – Dallas Cowboys running back DeMarco Murray attended practice for the third-straight day and team owner Jerry Jones said on his weekly radio show that Murray looks like he's on schedule to play Sunday against the Colts. Both Murray and offensive guard Zack Martin are listed as questionable. "Murray and Martin, I’m pretty positive about having the ability to play them and to get that decision,” Jones said Friday on KRLD/105.3 FM.