In one game, Demarco Murray has become the Dallas Cowboys leading rushing for the season and chances are good he will be the leading rusher for the Cowboys when the season ends.  With a new Dallas Cowboys rushing record, Demarco Murray has launched himself into the NFL mainstream. You can bet that his rookie cards will start to explode, especially over the next few weeks as collector’s will start to speculate about his cards current values.  There are already 410 Cowboy cards of Demarco Murray.  410!?  Mind boggling to say the least but thats the new card collecting world we live in.  More savy collectors will hold out and make sure this is not just a one hit wonder.  Chances are good that Murray will get more shots to prove his value with injuries to both Felix Jones and Tashard Choice. Murray will become the Cowboys new starting running back and with more performances like Sunday, he may be hard to unseat!