With each new rep we are getting a clearer and clearer picture of which Cowboys players could make the 53-man roster. The Dallas Cowboys have now played two preseason games and it’s getting a little easier to find some separation between certain players involved in key position battles. Today, we’ll take a look at some of the battles that we have been monitoring closely and see which player has the advantage. OFFENSE QB Cooper Rush vs. Will Grier With Rush being a little off last week and Grier out of action, the backup spot wasn’t looking all that promising after…