We've known for a while who the Cowboys will play in the preseason. Those opponents are the San Diego Chargers, the Baltimore Ravens, The Miami Dolphins and the Denver Broncos. That information was released back on April 9th. That's when we also learned of the complications that the One Direction concert would mean for the Cowboys, likely cutting short their training camp time out in Oxnard, CA.
When the NFL released the Cowboys schedule they also provided the dates of the pre-season contest and now we have the times to go along with that.
Your first shot at seeing a competitive game involving the Cowboys in 2014 will be at 10 PM EST on August 7th against the San Diego Chargers. Of course, I use that term competitive very loosely in this case. The full pre-season schedule is:
Thursday, August 7 - Dallas at San Diego (10:00p EST)
Saturday, August 16 - Baltimore at Dallas (7:00p EST)
Saturday, August 23 - Dallas at Miami (7:00p EST)
Thursday, August 28 - Denver at Dallas (8:00p EST)
We're still waiting on the Cowboys to announce their schedule for training camp.