A few takeaways from the Cowboys’ fifth OTA (second open to the media): Dak Prescott had an impressive day, especially early. His passes were in the correct spot, leading receivers, tight ends and backs. He was decisive. In the two-minute drill, he put the offense in position for a tying field goal, completing five of eight passes. One of the incompletions was a drop … Amari Cooper is a perfectionist. After he double-clutched a pass, he shook his hands in anger. While he made the catch, he knew he missed an opportunity to make a bigger play because he didn’t catch it cleanly … With Chidobe Awuzie (hamstring) and Byron Jones (hip) not practicing, Anthony Brown and Jourdan Lewis were the starters. C.J. Goodwin was the third corner with Lewis moving to the slot. Lewis and Randall Cobb had a good battle in the slot in the two-minute drill … New pickup Kerry Hyder had a would-be sack in red-zone work … Offensive coordinator Kellen Moore said he will be on the field during games with quarterbacks coach Jon Kitna in the coaches’ booth.