The Cowboys will finally be on the field taking part in football activity tonight when they face off against the San Francisco 49ers. The one great thing about having one of the younger teams in the NFL is that there aren’t too many guys that are so established that they would be given an off day. Though we can assume that we won’t see much of the starters tonight, there are quite a few young guys fighting for positions on the roster. Here are the five Cowboys to keep an eye on tonight that will likely get significant playing time.