Posted by Rafael at Tuesday, August 23, 2011 http://www.cowboysnation.com/2011/08/offensive-prospects-2012-big-search-for.html Update: Blogtalk Radio with DC Fantatic has been pushed back a day. We'll talk Cowboys at 11 ET on Wednesday. Join us here. Phillip Tanner's emergence has been a pleasant surprise from the early preseason, but obscures the fact that Dallas still wants a big back to close out drives and short-yardage plays. If the Cowboys keep four backs, and retain Tanner, Tashard Choice and DeMarco Murray, Felix Jones will be the biggest back on the team. Can he go 16 games playing Emmitt Smith at the goal-line and protecting 4th quarter leads?