Transactions
| Date | Player | Pos | Transactions |
| 9/22 | Tyvis Powell | S | active/prac. squad |
| 9/22 | Terence Garvin | LB | cut |
| 9/19 | Matt Tobin | T | cut |
| 9/17 | Reuben Foster | LB | suspension lifted |
| 9/12 | Terence Garvin | LB | signed One-year contract (through 2018) |
| 9/12 | Najee Toran | G | active/prac. squad |
| 9/12 | Frank Stephens | WR | pract. squad add |
| 9/12 | Aaron Burbridge | WR | cut |
| 9/12 | Aaron Burbridge | WR | off IR undisclosed |
| 9/12 | Brock Coyle | LB | on IR concussion |
| 9/8 | Dekoda Watson | LB | on IR hamstring |
| 9/7 | Malcolm Johnson | RB | cut |
| 9/7 | Malcolm Johnson | RB | off IR undisclosed |
| 9/6 | Daeshon Hall | DE | pract. squad add |
| 9/6 | Niles Scott | DT | pract. squad del |
| 9/3 | Zack Golditch | G | pract. squad add |
| 9/3 | Antone Exum Jr. | S | signed |
| 9/3 | Matt Tobin | T | signed |
| 9/3 | Jerick McKinnon | RB | on IR torn right ACL |
| 9/3 | Marcell Harris | S | on IR Achilles |
| 9/2 | Steven Dunbar | WR | pract. squad add |
| 9/2 | Ross Dwelley | TE | pract. squad add |
| 9/2 | Emmanuel Moseley | CB | pract. squad add |
| 9/2 | Nick Mullens | QB | pract. squad add |
| 9/2 | Tyvis Powell | S | pract. squad add |
| 9/2 | Niles Scott | DT | pract. squad add |
| 9/2 | Pita Taumoepenu | LB | pract. squad add |
| 9/2 | Najee Toran | G | pract. squad add |
| 9/2 | Jeff Wilson | RB | pract. squad add |
| 9/2 | Aaron Burbridge | WR | on IR undisclosed |
| 9/2 | JP Flynn | T | on IR undisclosed |
| 9/2 | Malcolm Johnson | RB | on IR undisclosed |
| 9/1 | Jeremiah Attaochu | LB | cut |
| 9/1 | Jonathan Cooper | G | cut |
| 9/1 | Steven Dunbar | WR | cut |
| 9/1 | Ross Dwelley | TE | cut |
| 9/1 | Antone Exum Jr. | S | cut |
| 9/1 | Cole Hikutini | TE | cut |
| 9/1 | Andrew Lauderdale | T | cut |
| 9/1 | Dexter McCoil | S | cut |
| 9/1 | Tarvarus McFadden | CB | cut |
| 9/1 | Jeremy McNichols | RB | cut |
| 9/1 | Emmanuel Moseley | CB | cut |
| 9/1 | Nick Mullens | QB | cut |
| 9/1 | Tyvis Powell | S | cut |
| 9/1 | Niles Scott | DT | cut |
| 9/1 | Coleman Shelton | G | cut |
| 9/1 | Pita Taumoepenu | LB | cut |
| 9/1 | Korey Toomer | LB | cut |
| 9/1 | Najee Toran | G | cut |
| 9/1 | Jeff Wilson | RB | cut |
| 9/1 | Kentavius Street | DE | reserve/non football injury |
| 8/31 | Shon Coleman | T | traded for 2019 seventh-round draft pick |
| 8/31 | Ja'Quan Gardner | RB | cut |
| 8/31 | Chris Gonzalez | G | cut |
| 8/31 | Jack Heneghan | QB | cut |
| 8/31 | Chris Jones | DT | cut |
| 8/31 | Jeff Locke | P | cut |
| 8/31 | Pace Murphy | T | cut |
| 8/31 | Aldrick Robinson | WR | cut |
| 8/31 | Wes Saxton | TE | cut |
| 8/31 | Will Sutton | DT | cut |
| 8/31 | Darrell Williams Jr. | T | cut |
| 8/31 | Joe Williams | RB | cut |
| 8/30 | Elvis Dumervil | DE | retired |
| 8/29 | Max McCaffrey | WR | cut |
| 8/28 | Ja'Quan Gardner | RB | signed |
| 8/28 | Chanceller James | S | cut |
| 8/22 | Cedric Thornton | DT | retired |
| 8/22 | Chris Jones | DT | signed One-year contract (through 2018) |
| 8/21 | Terrell Williams | S | cut |
| 8/21 | Terrell Williams | S | off IR undisclosed |
| 8/17 | Dexter McCoil | S | signed |
| 8/17 | Terrell Williams | S | on IR undisclosed |
| 8/14 | Alfred Morris | RB | signed/unrest FA |
| 8/14 | Alan Knott | C | cut |
| 8/5 | Chris Gonzalez | G | signed One-year contract (through 2018) |
| 8/5 | Corey Griffin | S | cut |
| 7/31 | Wes Saxton | TE | signed One-year contract (through 2018) |
| 7/31 | C.J. Goodwin | CB | cut |
| 7/26 | JP Flynn | T | signed Two-year contract (through 2019) |
| 7/26 | Will Sutton | DT | signed One-year contract (through 2018) |
| 7/26 | Cedric Thornton | DT | signed/unrest FA One-year contract (through 2018) |
| 7/26 | Don Jones | S | cut |
| 7/26 | Jamar McGloster | T | cut |
| 7/26 | Blaine Woodson | DE | cut |
| 7/25 | Dante Pettis | WR | signed Four-year contract (through 2021) |
| 7/23 | Mike McGlinchey | T | signed/draft choice Four-year contract (fifth-year option) |
| 7/3 | Reuben Foster | LB | suspended 2 games (NFL Substance Abuse Policy) |
| 6/22 | Laken Tomlinson | G | re-signed Three-year extension (through 2021) |
| 6/13 | Fred Warner | LB | signed/draft choice Four-year contract (through 2021) |
| 6/6 | Antone Exum Jr. | S | re-signed/unrest FA One-year contract (through 2018) |
| 6/4 | Trovon Reed | CB | cut |
| 6/1 | Victor Bolden Jr. | WR | suspended 4 games (NFL Policy on PEDs) |
| 5/15 | C.J. Goodwin | CB | acquired from waiver |
| 5/15 | DeAndre Carter | WR | cut |
| 5/15 | Blaine Woodson | DE | signed |
| 5/14 | Marcell Harris | S | signed/draft choice Four-year contract (through 2021) |
| 5/11 | D.J. Reed Jr. | CB | signed/draft choice Four-year contract (through 2021) |
| 5/9 | Mike Person | C | signed/unrest FA One-year contract (through 2018) |
| 5/7 | Zane Beadles | G | cut |
| 5/7 | Kentavius Street | DE | signed/draft choice Four-year contract (through 2021) |
| 5/5 | Richie James Jr. | WR | signed/draft choice Four-year contract (through 2021) |
| 5/5 | Tarvarius Moore | S | signed/draft choice Four-year contract (through 2021) |
| 5/5 | Jullian Taylor | DT | signed/draft choice Four-year contract (through 2021) |
| 5/2 | Coleman Shelton | G | signed |
| 5/2 | Jeff Wilson | RB | signed |
| 5/2 | Laken Tomlinson | G | team declines option Fifth-year option on rookie contract |
| 5/1 | Corey Griffin | S | signed Three-year contract (through 2020) |
| 5/1 | Tarvarus McFadden | CB | signed Three-year contract (through 2020) |
| 5/1 | Emmanuel Moseley | CB | signed Three-year contract (through 2020) |
| 5/1 | Najee Toran | G | signed Three-year contract (through 2020) |
| 4/30 | Arik Armstead | DT | team exercises option Fifth-year option on rookie contract |
| 4/30 | Jimmie Gilbert | LB | cut |
| 4/30 | Bo Lokombo | LB | cut |
| 4/30 | Dexter McCoil | S | cut |
| 4/30 | Donavin Newsom | LB | cut |
| 4/30 | Channing Stribling | CB | cut |
| 4/30 | Steven Dunbar | WR | signed |
| 4/30 | Ross Dwelley | TE | signed |
| 4/30 | Jack Heneghan | QB | signed |
| 4/30 | Alan Knott | C | signed |
| 4/30 | Jamar McGloster | T | signed |
| 4/30 | Terrell Williams | S | signed |
| 4/30 | Niles Scott | DT | signed |
| 4/27 | Jaquiski Tartt | S | re-signed Two-year extension (through 2020) |
| 4/4 | Korey Toomer | LB | signed/unrest FA One-year contract (through 2018) |
| 3/20 | Jonathan Cooper | G | signed/unrest FA One-year contract (through 2018) |
| 3/15 | Jeremiah Attaochu | LB | signed/unrest FA One-year contract (through 2018) |
| 3/14 | Tim Barnes | C | Declared Free Agent |
| 3/14 | Tank Carradine | DE | Declared Free Agent |
| 3/14 | Brock Coyle | LB | Declared Free Agent |
| 3/14 | Leger Douzable | DE | Declared Free Agent |
| 3/14 | Elvis Dumervil | DE | Declared Free Agent |
| 3/14 | Antone Exum Jr. | S | Declared Free Agent |
| 3/14 | Brandon Fusco | G | Declared Free Agent |
| 3/14 | Leon Hall | CB | Declared Free Agent |
| 3/14 | Carlos Hyde | RB | Declared Free Agent |
| 3/14 | Asa Jackson | CB | Declared Free Agent |
| 3/14 | Dontae Johnson | CB | Declared Free Agent |
| 3/14 | Chris Jones | DT | Declared Free Agent |
| 3/14 | Aaron Lynch | LB | Declared Free Agent |
| 3/14 | Louis Murphy | WR | Declared Free Agent |
| 3/14 | Logan Paulsen | TE | Declared Free Agent |
| 3/14 | Eric Reid | S | Declared Free Agent |
| 3/14 | Brock Coyle | LB | re-signed/unrest FA Three-year contract (through 2020) |
| 3/14 | Jerick McKinnon | RB | signed/unrest FA Four-year contract (through 2021) |
| 3/14 | Weston Richburg | C | signed/unrest FA Five-year contract (through 2022) |
| 3/12 | Raheem Mostert | RB | re-signed/excl. FA One-year tender (through 2018) |
| 3/12 | Jeff Locke | P | signed One-year contract (through 2018) |
| 3/11 | Richard Sherman | CB | signed Three-year contract (through 2020) |
| 3/8 | Marquise Goodwin | WR | re-signed Three-year extension (through 2021) |
| 2/27 | Garry Gilliam | T | re-signed Two-year extension (through 2019) |
Last updated Sep. 24, 1:03 A.M. ET
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