This trade is a chapter of the A.J. Derby (2016) trade tree — the full chain is traced there.
Patriots signed Bills RFA RB Mike Gillislee to a 2-year/$6.4M offer sheet (April 18, 2017); Bills declined to match on April 24, 2017. Buffalo received New England's 2017 5th-round pick (#163 overall, the better of the Patriots' two fifth-rounders; originally Denver's pick via the A.J. Derby trade) as compensation. Buffalo drafted LB Matt Milano (Boston College) at #163.
On April 24, 2017, Buffalo Bills sent RB Mike Gillislee to New England Patriots for a 2017 fifth-round pick (No. 163, became Matt Milano).