‘Carter, 24, was in line for a significant role this season as part of the defensive line rotation behind starters Ed Oliver and DaQuan Jones. The reigning AFC East champs are already down a pair of defensive linemen — Larry Ogunjobi and Michael Hoecht — for the first six games of the season after both were suspended for violating the NFL’s performance-enhancing substance policy. The Bills did focus heavily on the defensive line during the draft, adding T.J. Sanders in the second round, Landon Jackson in the third round and Deone Walker in the fourth round. In the wake of Carter’s injury, Sanders and Walker especially will take on a larger role early in the season.’