The Dallas Cowboys have 16 players set to become unrestricted free agents in March. In this series, we determine why a player should or should not return in 2016 and beyond.
Position: Defensive lineman
Age: 30
NFL experience: Six years
2015 salary: $745,000
2015 statistics: Hayden started 15 of 16 games and was credited by the coaches with 54 tackles, which was second among the Cowboys’ defensive linemen. He also had four tackles for loss, five quarterback pressures, two pass deflections and one fumble recovery.