Placed S Marcell Harris and RB Jerick McKinnon on injured reserve. Signed DB Antone Exum Jr. and OL Matt Tobin to one-year contracts and OL Zack Golditch to the practice squad.
September 2, 2018
Signed LB Pita Taumoepenu, WR Steven Dunbar Jr., TE Ross Dwelley, DBs Emmanuel Moseley and Tyvis Powell, QB Nick Mullens, OL Najee Toran, DL Niles Scott and RB Jeff Wilson Jr. to the practice squad.
August 31, 2018
Released OL JP Flynn, RB Ja'Quan Gardner, G Chris Gonzalez, QB Jack Heneghan, DL Chris Jones, P Jeff Locke, T Pace Murphy, WR Aldrick Robinson, TE Wes Saxton, DL Will Sutton, OL Darrell Williams and RB Joe Williams.
August 30, 2018
DE Elvis Dumervil announced his retirement.
August 29, 2018
Waived-injured WR Max McCaffrey.
August 22, 2018
Announced the retirement of DL Cedric Thornton. Signed DT Chris Jones to a one-year contract.
August 17, 2018
Signed DB Dexter McCoil to a one-year contract.
August 5, 2018
Waived S Corey Griffin. Signed G Chris Gonzalez to a one-year contract.
July 23, 2018
Signed OT Mike McGlinchey to a four-year contract.
June 22, 2018
Signed OL Laken Tomlinson to a three-year contract extension.
June 6, 2018
Signed DB Antone Exum Jr. to a one-year contract.
June 5, 2018
Waived DB Trovon Reed.
May 15, 2018
Claimed CB C.J. Goodwin off waivers from the New York Giants. Waived WR DeAndre Carter. Signed DL Blaine Woodson to a three-year contract.
May 14, 2018
Signed S Marcell Harris to a four-year contract.
May 11, 2018
Signed CB D.J. Reed Jr. to a four-year contract.
May 9, 2018
Signed OL Mike Person to a one-year contract.
May 7, 2018
Released G Zane Beadles. Signed DL Kentavius Street.
May 1, 2018
Signed S Corey Griffin, CBs Tarvarus McFadden and Emmanuel Moseley, and OL Najee Toran.
April 30, 2018
Exercised the fifth-year option on DL Arik Armstead. Signed WR Steven Dunbar, TE Ross Dwelley, QB Jack Heneghan, OL Alan Knott, OL Jamar McGloster, DL Niles Scott and S Terrell Williams. Waived LB Jimmie Gilbert, LB Boseko Lokombo, DB Dexter McCoil, LB Donavin Newsom and CB Channing Stribling.
April 27, 2018
Signed S Jaquiski Tartt to a two-year contract extension.
April 4, 2018
signed LB Korey Toomer to a one-year contract.
March 9, 2018
Promoted Paraag Marathe to president of 49ers Enterprises. Released DE Elvis Dumervil. Extended tender offers to exclusive rights to RB Raheem Mostert.