| Date | Player | Pos | Transactions |
| 8/31 | Peyton Barber | RB | cut |
| 8/31 | Antonio Gandy-Golden | WR | cut |
| 8/31 | Wes Martin | G | cut |
| 8/31 | Bunmi Rotimi | DE | cut |
| 8/31 | David Sharpe | T | cut |
| 8/31 | Jeremy Reaves | S | cut |
| 8/31 | Jimmy Moreland | CB | cut |
| 8/31 | Will Bradley-King | DE | cut |
| 8/31 | David Steinmetz | T | cut |
| 8/31 | Isaiah Wright | WR | cut |
| 8/31 | Steven Montez | QB | cut |
| 8/31 | Jon Toth | C | cut |
| 8/31 | Jonathan Williams | RB | cut |
| 8/31 | Joe Walker | LB | cut |
| 8/31 | Devaroe Lawrence | DT | cut |
| 8/31 | Caleb Wilson | TE | cut |
| 8/31 | Daniel Wise | DT | cut |
| 8/31 | Gabe Wright | DT | cut |
| 8/31 | Keith Ismael | C | cut |
| 8/31 | Beau Benzschawel | G | cut |
| 8/31 | Danny Johnson | CB | cut |
| 8/31 | Jordan Kunaszyk | LB | cut |
| 8/31 | David Mayo | LB | cut |
| 8/31 | Jared Norris | LB | cut |
| 8/30 | Tony Brown | WR | cut |
| 8/30 | Linden Stephens | CB | cut |
| 8/30 | Cole Luke | S | cut |
| 8/26 | Jon Toth | C | signed |
| 8/26 | Temarrick Hemingway | TE | cut |
| 8/26 | Rick Leonard | T | on IR undisclosed |
| 8/24 | Jordan Brown | CB | cut |
| 8/24 | Justin Phillips | LB | cut |
| 8/24 | Justus Reed | DE | cut |
| 8/24 | Jon Toth | C | cut |
| 8/23 | David Sharpe | T | reinstated |
| 8/23 | Steven Sims Jr. | WR | cut |
| 8/17 | Nick Guggemos | TE | cut |
| 8/17 | Greg Stroman | CB | cut |
| 8/16 | Josh Evans | S | retired |
| 8/15 | Lamar Miller | RB | cut |
| 8/15 | Kelvin Harmon | WR | cut |
| 8/15 | Chris Miller | CB | cut |
| 8/15 | Caleb Wilson | TE | acquired from waiver |
| 8/9 | Jon Toth | C | signed |
| 8/9 | Curtis Samuel | WR | reinstated |
| 8/8 | Cole Boozer | T | cut |
| 8/7 | Cole Boozer | T | signed |
| 8/5 | Brandon Scherff | G | reinstated |
| 8/5 | Daron Payne | DT | reinstated |
| 8/3 | Cornelius Lucas | T | reinstated |
| 8/3 | Matt Ioannidis | DT | reinstated |
| 8/3 | Chris Miller | CB | reinstated |
| 8/2 | Ross Reynolds | G | cut |
| 8/1 | Daron Payne | DT | reserve/non football injury COVID-19 |
| 7/31 | Ross Reynolds | G | acquired from waiver |
| 7/31 | David Sharpe | T | reserve/non football injury COVID-19 |
| 7/31 | Brandon Scherff | G | reserve/non football injury COVID-19 |
| 7/29 | Justus Reed | DE | signed |
| 7/29 | Nick Guggemos | TE | signed |
| 7/29 | Matt Ioannidis | DT | reserve/non football injury COVID-19 |
| 7/29 | Chris Miller | CB | reserve/non football injury COVID-19 |
| 7/29 | Curtis Samuel | WR | reserve/non football injury COVID-19 |
| 7/28 | Bunmi Rotimi | DE | signed |
| 7/27 | Logan Thomas | TE | re-signed Three-year extension (through 2024) |
| 7/27 | Deon Yelder | TE | cut |
| 7/27 | Jalen Jelks | DE | cut |
| 7/27 | Cornelius Lucas | T | reserve/non football injury COVID-19 |
| 7/27 | Tyrone Swoopes | TE | reserve/non football injury COVID-19 |
| 7/27 | Najee Toran | G | reserve/non football injury COVID-19 |
| 7/26 | Jonathan Allen | DT | re-signed Four-year extension (through 2025) |
| 6/7 | Gabe Wright | DT | signed |
| 6/7 | Najee Toran | G | signed |
| 6/4 | Dylan Cantrell | TE | on IR undisclosed |
| 5/25 | Ricky Seals-Jones | TE | signed/unrest FA |
| 5/20 | Geron Christian Sr. | T | cut |
| 5/20 | Morgan Moses | T | cut |
| 5/19 | Joe Walker | LB | signed/unrest FA |
| 5/19 | Josh Harvey-Clemons | LB | cut |
| 5/18 | Chris Miller | CB | acquired from waiver |
| 5/17 | Bobby McCain | S | signed One-year contract (through 2021) |
| 5/14 | Sam Cosmi | T | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Benjamin St-Juste | CB | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Dyami Brown | WR | signed/draft choice Four-year contract (through 2024) |
| 5/14 | John Bates | TE | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Darrick Forrest | S | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Camaron Cheeseman | C | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Will Bradley-King | DE | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Shaka Toney | DE | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Dax Milne | WR | signed/draft choice Four-year contract (through 2024) |
| 5/14 | Jamin Davis | LB | signed/draft choice Four-year contract (fifth-year option) |
| 5/12 | Charles Leno Jr. | T | signed One-year contract (through 2021) |
| 5/10 | Marcus Baugh | TE | cut |
| 5/6 | Deon Yelder | TE | signed/unrest FA |
| 5/6 | Linden Stephens | CB | signed/unrest FA |
| 5/3 | Jaret Patterson | RB | signed |
| 5/3 | Jeff Badet | WR | cut |
| 5/3 | Trevor Davis | WR | cut |
| 4/28 | Ereck Flowers Sr. | T | traded w/ pick for 2021 seventh-round pick |
| 4/27 | Daron Payne | DT | team exercises option Fifth-year option on rookie contract |
| 4/19 | Alex Smith | QB | retired |
| 4/19 | Bryce Love | RB | cut |
| 4/16 | DeMarkus Acy | CB | cut |
| 4/13 | Sammis Reyes | TE | signed Three-year contract (through 2023) |
| 4/13 | Beau Benzschawel | G | acquired from waiver |
| 4/9 | Caleb Brantley | DT | cut |
| 4/9 | Emanuel Hall | WR | cut |
| 4/9 | Javon Leake | RB | cut |
| 4/9 | Thaddeus Moss | TE | cut |
| 4/9 | Michael Warren | RB | cut |
| 4/1 | DeAndre Carter | WR | signed/unrest FA One-year contract (through 2021) |
| 3/29 | Lamar Miller | RB | re-signed/unrest FA One-year contract (through 2021) |
| 3/29 | David Sharpe | T | re-signed/unrest FA One-year contract (through 2021) |
| 3/26 | Adam Humphries | WR | signed One-year contract (through 2021) |
| 3/26 | Darryl Roberts | CB | signed/unrest FA One-year contract (through 2021) |
| 3/24 | Cam Sims | WR | re-signed/rest FA One-year contract (through 2021) |
| 3/23 | Danny Johnson | CB | re-signed/unrest FA One-year contract (through 2021) |
| 3/23 | Jared Norris | LB | re-signed/unrest FA One-year contract (through 2021) |
| 3/18 | Kyle Allen | QB | re-signed/excl. FA One-year contract (through 2021) |
| 3/18 | Dustin Hopkins | K | re-signed/unrest FA One-year contract (through 2021) |
| 3/18 | Curtis Samuel | WR | signed/unrest FA Three-year contract (through 2023) |
| 3/18 | Tyler Larsen | C | signed/unrest FA One-year contract (through 2021) |
| 3/18 | David Mayo | LB | signed One-year contract (through 2021) |
| 3/17 | Lamar Miller | RB | Declared Free Agent |
| 3/17 | Nick Sundberg | C | Declared Free Agent |
| 3/17 | Ryan Anderson | LB | Declared Free Agent |
| 3/17 | Ronald Darby | CB | Declared Free Agent |
| 3/17 | Reuben Foster | LB | Declared Free Agent |
| 3/17 | Mychal Kendricks | LB | Declared Free Agent |
| 3/17 | Ryan Kerrigan | DE | Declared Free Agent |
| 3/17 | Fabian Moreau | CB | Declared Free Agent |
| 3/17 | Jared Norris | LB | Declared Free Agent |
| 3/17 | Kevin Pierre-Louis | LB | Declared Free Agent |
| 3/17 | David Sharpe | T | Declared Free Agent |
| 3/17 | Jeremy Sprinkle | TE | Declared Free Agent |
| 3/17 | Cam Sims | WR | Restricted Free Agent |
| 3/17 | Robert Foster | WR | Declared Free Agent |
| 3/17 | Danny Johnson | CB | Declared Free Agent |
| 3/17 | William Jackson III | CB | signed/unrest FA Three-year contract (through 2023) |
| 3/17 | Ryan Fitzpatrick | QB | signed/unrest FA One-year contract (through 2021) |
| 3/17 | Dustin Hopkins | K | Declared Free Agent |
| 3/12 | Brandon Scherff | G | re-signed/franchise One-year tender (through 2021) |
| 3/9 | Brandon Scherff | G | Designated franchise player non-exclusive franchise tag |
| 3/5 | Alex Smith | QB | cut |
| 3/3 | Thomas Davis Sr. | LB | cut |