Browns have nine undrafted rookies entering Week One

The Browns will begin the 2013 season with a roster teeming with youth. At present, 27 of the Cleveland Browns’ 53 roster spots belong to rookies, second-year players and one first-year pro. One-third of those players are undrafted rookies: defensive back Josh Aubrey (formerly of Stephen F. Austin), tight end MarQueis Gray (Minnesota), linebacker Paul…