The 2017 NFL League year began on March 9 at 4:00 p.m. EST. On March 7, clubs were allowed to contact and enter into contract negotiations with the agents of players who became unrestricted free agents upon the expiration of their contracts two days later. On March 9, clubs exercised options for 2017 on players who have option clauses in their contracts, submitted qualifying offers to their restricted free agents with expiring contracts and to whom desire to retain a Right of Refusal/Compensation, submitted a Minimum Salary Tender to retain exclusive negotiating rights to their players with expiring 2016 contracts and who have fewer than three accrued seasons of free agent credit, and teams were required to be under the salary cap using the "Top-51" definition (in which the 51 highest paid-players on the team's payroll must have a collected salary cap hit below the actual cap). The 2017 trading period also began the same day.

Free agency @ NFL

A total of 496 players were eligible for some form of free agency at the beginning of the free agency period.[4] Among the high-profile players who changed teams via free agency were cornerbacks A.J. Bouye (from Texans to Jaguars), Logan Ryan (from Patriots to Titans), and Stephon Gilmore (from Bills to Patriots); safeties Barry Church (from Cowboys to Jaguars), Johnathan Cyprien (from Jaguars to Titans), Micah Hyde (from Packers to Bills), and Tony Jefferson (from Cardinals to Ravens); linebackers Jabaal Sheard (from Patriots to Colts), Malcolm Smith (from Raiders to 49ers),

and Manti Te'o (from Chargers to Saints); defensive tackles Johnathan Hankins (from Giants to Colts) and Calais Campbell (from Cardinals to Jaguars); offensive tackles Andrew Whitworth (from Bengals to Rams), Kelvin Beachum (from Jaguars to Jets), Matt Kalil (from Vikings to Panthers), Mike Remmers (from Panthers to Vikings), Ricky Wagner (from Ravens to Lions), Riley Reiff (from Lions to Vikings), and Russell Okung (from Broncos to Chargers); offensive guards Kevin Zeitler (from Bengals to Browns),

Larry Warford (from Lions to Saints), Ronald Leary (from Cowboys to Broncos), and T.J. Lang (from Packers to Lions); tight ends Martellus Bennett (from Patriots to Packers) and Jared Cook (from Packers to Raiders); wide receivers Alshon Jeffery (from Bears to Eagles), Brandon Marshall (from Jets to Giants), DeSean Jackson (from Redskins to Buccaneers), Kenny Britt (from Rams to Browns), Pierre Garçon (from Redskins to 49ers), Robert Woods (from Bills to Rams), Terrelle Pryor (from Browns to Redskins),

and Torrey Smith (from 49ers to Eagles); running backs Latavius Murray (from Raiders to Vikings), Adrian Peterson (from Vikings to Saints), Eddie Lacy (from Packers to Seahawks), and Jamaal Charles (from Chiefs to Broncos); fullbacks Mike Tolbert (from Panthers to Bills) and Patrick DiMarco (from Falcons to Bills); quarterback Mike Glennon (from Buccaneers to Bears) @ NFL.