Kansas City Chiefs
Key additions: DT Bennie Logan, DB Marqueston Huff
Key departures: QB Nick Foles, NT Dontari Poe, RB Jamaal Charles
Kansas City didn't have a lot of holes to fill, particularly after they retained safety Eric Berry and guard Laurent Duvernay-Tardif with long-term contract extensions. Nick Foles' departure isn't devastating, but it does leave Kansas City without a reserve quarterback who has thrown a regular-season pass.
Key additions: WR Cordarrelle Patterson, TE Jared Cook, OL Marshall Newhouse
Key departures: RB Latavius Murray, OLB Malcolm Smith, DT Stacy McGee, T
Smith, McGee, Watson, Allen and Hayden are also sizable losses, as they combined for 34 starts last season. McGee was a strong piece of their run defense on the line, but over his career, McGee has played just 30.6 percent of the Raiders' defensive snaps, per Pro Football Focus.
Though Oakland hasn't yet utilized free agency to address any of those departures, they added two offensive pieces with Patterson and Cook. Patterson's a speedster who gives the Raiders a big boost on special teams and another weapon for QB Derek Carr. Cook is probably best known for his stunning last-second catch against Dallas that set up Green Bay for the game-winning field goal in the Divisional Round. He will add to Oakland's group of tight ends that includes Mychal Rivera and Clive Walford.
Los Angeles Chargers
Key additions: OT Russell Okung
Key departures: RB Danny Woodhead, G D.J. Fluker, OT King Dunlap
Though Okung is the Chargers' only signing so far, they made other big moves in re-signing safety Jahleel Addae and assigning the franchise tag to dynamic outside linebacker Melvin Ingram.
Their two biggest free-agency losses were Fluker and Woodhead, who signed with the Giants and Ravens, respectively. Woodhead was a solid reserve running back who was a Swiss-army knife for the Chargers' offense, offering reliable production as rushing and receiving options.