K.J. Wright
While the Buffalo Bills play most of their defensive snaps in the nickel formation, their base defense is technically a 4-3 defense. This means that A.J. Klein would be considered the starter next to Tremaine Edmunds and Matt Milano. When considering this, a player like K.J. Wright would be a clear upgrade over Klein and would step in as a starter.
Wright has been a key part of the Seattle Seahawks defense playing alongside Bobby Wagner. In 10 seasons, Wright has 941 total tackles, six interceptions, 54 passes defended, 11 forced fumbles, and nine fumble recoveries.
There is no question that K.J. Wright is not playing at the same level he did earlier in his career but he is a player that if he was signed would be penciled in as the starter right away.