It's essentially only a procedural move usually not exercised, and that was the case again this year for 172 unsigned unrestricted free agents as of June 1.
The free-agency signing period for unrestricted free agents technically lasts until July 22, and teams are able to tender their unsigned UFAs on June 1 if they want to have exclusive signing rights to those players after July 22.
Teams rarely exercise those tenders and that was the case again this year as none of the 172 players received the qualifying offer. That total includes several players that have previously announced their retirement. It also includes running back Justin Forsett (Seahawks) and cornerback Alan Ball (Cowboys), who have signed with the Houston Texans, and safety Abram Elam (Cowboys), signed by the Kansas City Chiefs, all after June 1.
There were 427 players that began the league year in March as unrestricted free agents. The 172 unsigned players do not include players released.
Of some importance is that non-tendered UFAs who sign with new teams after June 1 do not count as players lost when compensatory draft picks are allocated next March.
Following are the adjusted 169 non-tendered UFAs, not including Forsett, Ball and Elam:
Arizona: S Hamza Abdullah; LB Clark Haggans; DE Vonnie Holliday; OT Brandon Keith; CB Joey Porter; RB Chester Taylor; OG Floyd Womack.
Atlanta: OT Kirk Chambers; TE Reggie Kelly; LB Mike Peterson; G/C Brett Romberg.
Baltimore: C/G Andre Gurode; LB Edgar Jones; TE Kris Wilson.
Buffalo: CB Reggie Corner; LB Andra Davis; PK Dave Rayner; LB Reggie Torbor.
Carolina: LB Omar Gaither; CB Cletis Gordon; TE Jeremy Shockey.
Chicago: LS Chris Massey; WR Roy Williams.
Cincinnati: RB Cedric Benson; CB Kelly Jennings; LB Brandon Johnson; TE Bo Scaife; OG Bobbie Williams; S Gibril Wilson.
Cleveland: P Brad Maynard.
Dallas: LB Keith Brooking; OG Derrick Dockery; OG Montrae Holland; QB Jon Kitna (retired); P Mat McBriar; RB Sammy Morris; CB Frank Walker.
Denver: LS David Binn; G/C Russ Hochstein; DT Marcus Thomas.
Detroit: OG Leonard Davis; WR Rashied Davis; LB Isaiah Ekejiuba; S Chris Harris; CB Brandon McDonald; RB Maurice Morris; WR Maurice Stovall.
Green Bay: RB Ryan Grant; DL Howard Green.
Houston: S Dominique Barber; DE Tim Bulman; QB Jake Delhomme; QB Jeff Garcia; WR Bryant Johnson; OG Kasey Studdard; P Matt Turk; RB Derrick Ward.
Indianapolis: LB Kevin Bentley; DE Tyler Brayton; QB Kerry Collins; G/T Ryan Diem (retired); DT Eric Foster; LB Ernie Sims.
Jacksonville: S C.C. Brown; CB David Jones; QB Luke McCown; DE Matt Roth.
Kansas City: RB Jackie Battle; TE Anthony Becht; DE Wallace Gilberry; NT Kelly Gregg; RB Thomas Jones; S Jon McGraw; OT Ryan O'Callaghan; S Sabby Piscitelli; WR Jerheme Urban; C Casey Wiegmann.
Miami: LB Ikaika Alama-Francis; OG Vernon Carey; QB J.P. Losman; LB Jason Taylor (retired).
Minnesota: FS Husain Abdullah; LB Xavier Adibi; WR Greg Camarillo; LB E.J. Henderson; LS Matt Katula; TE Jim Kleinsasser (retried); OL Scott Kooistra; S Jarrad Page; CB Benny Sapp; TE Visanthe Shiancoe.
New England: DE Andre Carter; DE Shaun Ellis; RB Kevin Faulk; S James Ihedigbo; CB Nathan Jones.
New Orleans: DE Jeff Charleston; DT Aubrayo Franklin; TE John Gilmore; TE Tory Humphrey; T Pat McQuistan.
New York Giants: OL Stacy Andrews; DT Rocky Bernard; CB Will Blackmon; WR Michael Clayton; S Deon Grant; DT Jimmy Kennedy; S Derrick Martin; OT Kareem McKenzie; OL Tony Ugoh.
New York Jets: QB Mark Brunell; WR Plaxico Burress; S Jim Leonhard; QB Kevin O'Connell; CB Donald Strickland; RB LaDainian Tomlinson.
Oakland: LB Darryl Blackstock; QB Kyle Boller; WR T.J. Houshmandzadeh; DE Jarvis Moss; CB Lito Sheppard.
Philadelphia: DE Victor Abiamiri; RB Ronnie Brown.
Pittsburgh: QB Dennis Dixon; NT Chris Hoke (retired); CB Anthony Madison; RB Mewelde Moore; P Daniel Sepulveda; OT Max Starks.
St. Louis: TE Billy Bajema; S James Butler; WR Mark Clayton; QB A.J. Feeley; OL Adam Goldberg; CB Rod Hood; CB Justin King; T Mark LeVoir; RB Jerious Norwood; LB Brady Poppinga; TE Stephen Spach; WR Cadillac Williams; C Tony Wragge.
San Diego: LB Stephen Cooper; WR Patrick Crayton; LB Na'il Diggs; DL Tommie Harris; OT Tony Moll; G Scott Mruczkowski; FS Paul Oliver; S Bob Sanders.
San Francisco: FB Moran Norris; TE Justin Peelle.
Seattle: DE Raheem Brock; LB David Vobora; DE Jimmy Wilkerson.
Tampa Bay: RB Earnest Graham; DT Jovan Haye; S Sean Jones; CB Elbert Mack.
Tennessee: LS Ken Amato; FB Ahmard Hall; S Chris Hope; OG Jake Scott; S Anthony Smith.
Washington: WR David Anderson; CB Phillip Buchanon; LB Keyaron Fox; LB Rocky McIntosh.