Defensive Line
The Buffalo Bills did draft one defensive tackle but they could revisit the position on Day 3 if Khristian Boyd is still available when they are on the clock. He is more of a run-stuffing defensive tackle and could be a good option to back up DaQuan Jones as a one-tech.
At defensive end, one player who jumps out that could be an option for the Bills is Mohamed Kamara out of Colorado State. He has been very productive the past two seasons with 21.5 sacks and 33 tackles for a loss. As a development-type player, he could be a great addition in one of those final spots of the rotation.
Cornerback
The cornerback position is not necessarily a pressing need but it is a position that teams can't have too much depth. It would be surprising if one of the seven picks didn't go to the position and the one player that makes the most sense is M.J. Devonshire out of Pittsburgh.
The Bills had a Top-30 visit with Devonshire and he does a great job forcing turnovers with seven interceptions the past two seasons. It wouldn't be surprising if he was the next Levi Wallace or Dane Jackson as a late round/undrafted free agent corner who finds his way into a starter role.