Newly signed linebacker Anthony Barr will start his Dallas Cowboy career on the physically unable to perform list as part of his ramp up to training camp. When he gets on the field, Barr will give the Cowboys some experienced depth at the position while serving as a complement to do-everything All-Pro linebacker Micah Parsons. Barr, a former four-time Pro Bowler in eight seasons with the Minnesota Vikings, is similar to Parsons in his ability to play off the ball as well as rush the passer. He had a career-high three interceptions to go along with 2.5 sacks and 72 tackles last season “I think …