| | DT | Released (The Seattle Seahawks released DT Al Woods.) |
| | LB | Signed (The Seattle Seahawks signed LB Devin Bush.) |
| | S | Signed (The Seattle Seahawks signed S Julian Love.) |
| | CB | Signed (The Seattle Seahawks signed CB Lonnie Johnson.) |
| | QB | Signed (The Seattle Seahawks signed QB Drew Lock.) |
| | OLB | Signed (The Seattle Seahawks signed OL Evan Brown.) |
| | SS | Re-signed (The Seattle Seahawks re-signed DB Ryan Neal.) |
| | DE | Released (The Seattle Seahawks released DL Quinton Jefferson.) |
| | DE | Signed (The Seattle Seahawks signed DE Dre'Mont Jones.) |
| | DT | Signed (The Seattle Seahawks signed DT Jarran Reed.) |
| | SS | Declared Free Agent (DB Teez Tabor declared free agency.) |
| | LS | Declared Free Agent (LS Tyler Ott declared free agency.) |
| | FS | Declared Free Agent (DB Johnathan Abram declared free agency.) |
| | RB | Declared Free Agent (RB Travis Homer declared free agency.) |
| | LB | Declared Free Agent (FB Cullen Gillaspia declared free agency.) |
| | QB | Declared Free Agent (QB Drew Lock declared free agency.) |
| | RB | Declared Free Agent (RB Rashaad Penny declared free agency.) |
| | DE | Released (The Seattle Seahawks released DL Shelby Harris.) |
| | OLB | Declared Free Agent (LB Cody Barton declared free agency.) |
| | OLB | Declared Free Agent (OL Kyle Fuller declared free agency.) |
| | LS | Declared Free Agent (LS Carson Tinker declared free agency.) |
| | DT | Declared Free Agent (DL Poona Ford declared free agency.) |
| | SS | Declared Free Agent (DB Ryan Neal declared free agency.) |
| | S | Declared Free Agent (DB Josh Jones declared free agency.) |
| | CB | Declared Free Agent (DB Artie Burns declared free agency.) |
| | CB | Declared Free Agent (DB Justin Coleman declared free agency.) |
| | LB | Declared Free Agent (LB Darryl Johnson declared free agency.) |
| | DE | Declared Free Agent (DL L.J. Collier declared free agency.) |
| | WR | Declared Free Agent (WR Marquise Goodwin declared free agency.) |
| | G | Released (The Seattle Seahawks released G Gabe Jackson.) |
| | LB | Released (The Seattle Seahawks released LB Benn Burr-Kirven.) |
| | G | Retired (OL Austin Blythe retired from the NFL.) |
| | LB | Re-signed (The Seattle Seahawks re-signed FB Nick Bellore.) |
| | LB | Pract. squad add (The Seattle Seahawks released LB Alexander Johnson.) |
| | RB | Released (The Seattle Seahawks released RB Wayne Gallman.) |
| | QB | Released (The Seattle Seahawks released QB Sean Mannion.) |
| | LB | Released (The Seattle Seahawks released LB Aaron Donkor.) |
| | TE | Released (The Seattle Seahawks released TE Jacob Hollister.) |
| | SS | Released (The Seattle Seahawks released DB Steven Parker.) |
| | C | Signed (The Seattle Seahawks signed C Joey Hunt to a reserve/future contract.) |
| | WR | Signed (The Seattle Seahawks signed WR Cade Johnson to a reserve/future contract.) |
| | WR | Signed (The Seattle Seahawks signed WR Easop Winston Jr. to a reserve/future contract.) |
| | DT | Signed (The Seattle Seahawks signed DT Jarrod Hewitt to a reserve/future contract.) |
| | WR | Signed (The Seattle Seahawks signed WR Connor Wedington to a reserve/future contract.) |
| | LB | Signed (The Seattle Seahawks signed LB Chris Garrett to a reserve/future contract.) |
| | RB | Signed (The Seattle Seahawks signed RB Darwin Thompson to a reserve/future contract.) |
| | T | Signed (The Seattle Seahawks signed OT Greg Eiland to a reserve/future contract.) |
| | CB | Signed (The Seattle Seahawks signed CB Chris Steele to a reserve/future contract.) |
| | T | Signed (The Seattle Seahawks signed T Jalen McKenzie to a reserve/future contract.) |
| | LB | Activated (The Seattle Seahawks elevated LB Alexander Johnson to the active roster.) |
| | WR | Activated (The Seattle Seahawks elevated WR Cade Johnson to the active roster.) |
| | RB | Signed (The Seattle Seahawks signed RB Tony Jones Jr. to the active roster.) |
| | LB | Signed (The Seattle Seahawks signed LB Chris Garrett to the practice squad.) |
| | WR | Placed on Injured Reserve, Designated for Return (The Seattle Seahawks designated WR Dee Eskriedge for return from injured reserve. ) |
| | LB | Pract. squad add (The Seattle Seahawks assigned LB Alexander Johnson to the practice squad.) |
| | WR | Pract. squad add (The Seattle Seahawks assigned WR Cade Johnson to the practice squad.) |
| | RB | Placed on Injured Reserve (The Seattle Seahawks placed RB Travis Homer on injured reserve. ) |
| | LB | Activated (The Seattle Seahawks elevated LB Alexander Johnson from the practice squad. ) |
| | LB | Activated (The Seattle Seahawks signed LB Josh Onujiogu from the practice squad. ) |
| | WR | Activated (The Seattle Seahawks elevated WR Cade Johnson from the practice squad. ) |
| | CB | Signed (The Seattle Seahawks signed CB Chris Steele to the practice squad.) |
| | TE | Activated (The Seattle Seahawks elevated TE Tyler Mabry from the practice squad.) |
| | LB | Placed on Injured Reserve (The Seattle Seahawks placed LB Jordyn Brooks on IR.) |
| | WR | Signed (The Seattle Seahawks signed WR Connor Wedington to the practice squad.) |
| | TE | Pract. squad add (The Seattle Seahawks assigned TE Tyler Mabry to the practice squad.) |
| | WR | Pract. squad add (The Seattle Seahawks assigned WR Cade Johnson to the practice squad.) |
| | TE | Activated (The Seattle Seahawks elevated TE Tyler Mabry to the active roster.) |
| | WR | Activated (The Seattle Seahawks elevated WR Cade Johnson to the active roster.) |
| | LB | Signed (The Seattle Seahawks signed OLB Vi Jones to the active roster.) |
| | WR | Placed on Injured Reserve (The Seattle Seahawks placed WR Marquise Goodwin on injured reserve.) |
| | TE | Signed (The Seattle Seahawks signed TE Jacob Hollister to their practice squad.) |
| | CB | Placed on Injured Reserve, Designated for Return (The Seattle Seahawks placed DB Isaiah Dunn on IRD.) |
| | DE | Claimed (The Seattle Seahawks claimed DL Isaiah Mack.) |
| | WR | Signed (The Green Bay Packers signed WR Bo Melton.) To |
| | TE | Placed on Injured Reserve (The Seattle Seahawks placed TE Will Dissly on IR.) |
| | DT | Waived (The Seattle Seahawks waived DL Daviyon Nixon.) |
| | SS | Signed (The Seattle Seahawks signed DB Steven Parker to the practice squad.) |
| | CB | Activated (The Seattle Seahawks signed CB Xavier Crawford to the active roster.) |
| | RB | Signed (The Seattle Seahawks signed RB Tony Jones Jr. to the practice squad.) |
| | FS | Placed on Injured Reserve (The Seattle Seahawks placed SAF Joey Blount on injured reserve.) |
| | RB | Signed (The Seattle Seahawks signed RB Godwin Igwebuike to the active roster.) |
| | RB | Activated (The Seattle Seahawks elevated RB Wayne Gallman from the practice squad.) |
| | RB | Activated (The Seattle Seahawks elevated RB Godwin Igwebuike from the practice squad.) |
| | RB | Waived (The Seattle Seahawks waived RB Tony Jones Jr.) |
| | DT | Signed (The Seattle Seahawks signed DL Daviyon Nixon.) |
| | WR | Signed (The Seattle Seahawks signed WR Laquon Treadwell to the active roster.) |
| | DT | Signed (The Seattle Seahawks signed DL Jarrod Hewitt to the practice squad.) |
| | DT | Placed on Injured Reserve (The Seattle Seahawks placed DL Bryan Mone on IR.) |
| | RB | Pract. squad add (The Seattle Seahawks assigned RB Godwin Igwebuike to the practice squad.) |
| | RB | Signed (The Seattle Seahawks signed RB Wayne Gallmas to the practice squad.) |
| | WR | Waived (The Seattle Seahawks cut Jaylen Smith from the practice squad.) |
| | RB | Activated (The Seattle Seahawks elevated RB Godwin Igwebuike to the active roster.) |
| | WR | Signed (The Seattle Seahawks signed WR Jaylen Smith to the practice squad.) |
| | RB | Released (The Seattle Seahawks released RB Wayne Gallman.) |
| | RB | Pract. squad add (The Seattle Seahawks assigned RB Godwin Igwebuike to the practice squad.) |
| | WR | Pract. squad add (The Seattle Seahawks assigned WR Laquon Treadwell to the practice squad.) |
| | RB | Activated (The Seattle Seahawks elevated RB Godwin Igwebuike from the practice squad. ) |
| | WR | Activated (The Seattle Seahawks elevated WR Laquon Treadwell from the practice squad. ) |
| | LB | Activated (The Seattle Seahawks activated LB Jon Rhattigan from injured reserve. ) |
| | OLB | Activated (The New York Jets elevated OL Laurent Duvernay-Tardif to the active roster.) From |
| | RB | Signed (The Seattle Seahawks signed RB Wayne Gallman to the practice squad.) |
| | DT | Released (The Seattle Seahawks released DT Jarrod Hewitt from the practice squad.) |
| | S | Placed on Injured Reserve (The Seattle Seahawks placed S Josh Jones on IR.) |
| | WR | Pract. squad add (The Seattle Seahawks assigned WR Laquon Treadwell to the practice squad.) |
| | LB | Pract. squad add (The Seattle Seahawks assigned LB Vi Jones to the practice squad.) |
| | LB | Activated (The Seattle Seahawks elevated LB Vi Jones to the active roster.) |
| | WR | Activated (The Seattle Seahawks elevated WR Laquon Treadwell to the active roster.) |
| | WR | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | WR | Active/prac. squad (Signed) |
| | S | Pract. squad add (Signed) To |
| | CB | Pract. squad add (Signed) To |
| | DT | Pract. squad add (Signed) |
| | TE | Retired (Signed) To |
| | WR | Pract. squad del (Signed) |
| | CB | Activated from PUPL (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | RB | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | CB | Signed (Signed) To |
| | LB | Active/prac. squad (Signed) |
| | LB | Active/prac. squad (Signed) |
| | WR | Pract. squad add (Signed) From |
| | WR | Pract. squad del (Signed) |
| | CB | Cut (Signed) |
| | WR | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | WR | Active/prac. squad (Signed) |
| | LB | Active/prac. squad (Signed) |
| | LB | Pract. squad add (Signed) From |
| | WR | Pract. squad add (Signed) |
| | LB | Pract. squad del (Signed) |
| | RB | Pract. squad del (Signed) |
| | LB | Pract. squad add (Signed) |
| | CB | Pract. squad add (Signed) |
| | CB | Active/prac. squad (Signed) |
| | LB | Active/prac. squad (Signed) |
| | LB | Pract. squad add (Signed) To |
| | WR | Pract. squad del (Signed) |
| | DE | Pract. squad add (Signed) To |
| | WR | Pract. squad add (Signed) From |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | CB | Pract. squad add (Signed) |
| | DB | Pract. squad add (Signed) To |
| | DE | Pract. squad del (Signed) |
| | WR | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | LB | Pract. squad add (Signed) From |
| | CB | Cut (Signed) |
| | T | Pract. squad del (Signed) |
| | CB | Cut (Signed) |
| | RB | Acquired from waiver (Signed) From |
| | LB | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | LB | Active/prac. squad (Signed) |
| | DB | Pract. squad del (Signed) |
| | C | Pract. squad add (Signed) From |
| | S | Pract. squad add (Signed) To |
| | DB | Pract. squad del (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | RB | Pract. squad add (Signed) From |
| | CB | Active/prac. squad (Signed) |
| | LB | Pract. squad add (Signed) From |
| | S | Pract. squad del (Signed) |
| | CB | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | CB | Active/prac. squad (Signed) |
| | OLB | Pract. squad add (Signed) To |
| | CB | Pract. squad add (Signed) |
| | CB | Active/prac. squad (Signed) |
| | SS | Active/prac. squad (Signed) From |
| | RB | Pract. squad add (Signed) To |
| | LB | Pract. squad add (Signed) From |
| | LB | Active/prac. squad (Signed) |
| | S | Pract. squad add (Signed) |
| | LS | Active/prac. squad (Signed) |
| | LS | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | LB | Active/prac. squad (Signed) |
| | LS | Active/prac. squad (Signed) |
| | S | Pract. squad del (Signed) |
| | LS | Pract. squad add (Signed) From |
| | RB | Cut (Signed) |
| | S | Pract. squad add (Signed) To |
| | QB | Pract. squad add (Signed) From |
| | CB | Pract. squad add (Signed) From |
| | DE | Pract. squad add (Signed) From |
| | LB | Pract. squad add (Signed) |
| | WR | Pract. squad add (Signed) To |
| | T | Pract. squad add (Signed) From |
| | QB | Pract. squad add (Signed) To |
| | CB | Signed (Signed) |
| | C | Pract. squad add (Signed) To |
| | RB | Pract. squad add (Signed) |
| | T | Pract. squad add (Signed) |
| | S | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | WR | Pract. squad add (Signed) |
| | TE | Pract. squad add (Signed) |
| | LB | Pract. squad add (Signed) |
| | WR | Pract. squad add (Signed) |
| | T | Pract. squad add (Signed) |
| | WR | Pract. squad add (Signed) |
| | DB | Pract. squad add (Signed) From |
| | LB | Acquired from waiver (Signed) From |
| | LB | Pract. squad add (International Player Pathway Program) |
| | CB | Acquired from waiver (Signed) From |
| | LB | Cut (Signed) |
| | RB | Cut (Signed) |
| | CB | Cut (Signed) |
| | C | Cut (Signed) |
| | LB | Cut (Signed) |
| | T | Cut (Signed) |
| | T | Cut (Signed) |
| | S | Cut (Signed) |
| | WR | Cut (Signed) |
| | WR | Cut (Signed) |
| | QB | Cut (Signed) |
| | TE | Cut (Signed) |
| | S | Cut (Signed) |
| | DT | Cut (Signed) |
| | LB | Cut (Signed) |
| | LB | Cut (Signed) |
| | WR | Cut (Signed) |
| | RB | Cut (Signed) |
| | WR | Cut (Signed) |
| | WR | Cut (Signed) |
| | S | Cut (Signed) |
| | LB | Cut (Signed) |
| | WR | Cut (Signed) |
| | LB | Cut (Signed) |
| | TE | Cut (Signed) |
| | CB | Placed on PUPL (knee) |
| | RB | Cut (Signed) |
| | CB | Cut (Signed) |
| | LB | Placed on PUPL (knee) |
| | RB | Signed (Signed) From |
| | G | Cut (Signed) |
| | TE | Signed (Signed) |
| | TE | Signed (Signed) To |
| | DT | Cut (Signed) |
| | TE | Cut (Signed) |
| | S | Cut (Signed) |
| | LB | Cut (Signed) |
| | CB | Cut (Signed) |
| | WR | Traded (for S Ugo Amadi) From |
| | S | Traded (for WR J.J. Arcega-Whiteside) To |
| | T | Signed/unrest FA (Two-year contract (through 2023)) To |
| | DT | Signed (Signed) To |
| | G | Cut (Signed) |
| | DT | Cut (Signed) |
| | WR | Cut (Signed) |
| | CB | Cut (Signed) |
| | G | Cut (Signed) |
| | CB | Signed (Signed) From |
| | WR | Signed (Signed) To |
| | LB | Signed (Signed) From |
| | TE | Cut (Signed) |
| | DT | Signed (Signed) From |
| | G | Retired (Signed) |
| | WR | Re-signed (Three-year extension (through 2025)) |
| | G | Signed (One-day contract) From |
| | DE | Signed (One-year contract (through 2022)) To |
| | LB | Retired (Signed) |
| | LB | Signed (One-day contract) From |
| | G | Signed (Signed) |
| | G | Signed (Signed) From |
| | LB | Placed on PUPL (Signed) |
| | TE | Signed (Signed) From |
| | RB | Retired (Signed) |
| | CB | Signed/draft choice (Four-year contract (through 2025)) |
| | RB | Signed/draft choice (Four-year contract (through 2025)) |
| | LB | Signed/draft choice (Four-year contract (through 2025)) |
| | DL | Signed/unrest FA (One-year contract (through 2022)) To |
| | CB | Signed/unrest FA (Signed) To |
| | G | Cut (Signed) |
| | DT | Re-signed (Two-year extension (through 2024)) |
| | DE | Cut (Signed) |
| | T | Signed/draft choice (Four-year contract (fifth-year option)) |
| | T | Signed/draft choice (Four-year contract (through 2025)) |
| | WR | Signed/unrest FA (Signed) From |
| | QB | Cut (Signed) |
| | T | Signed (Signed) |
| | CB | Signed (Signed) |
| | TE | Cut (Signed) |
| | WR | Cut (Signed) |
| | WR | Cut (Signed) |
| | WR | Signed (Signed) From |
| | WR | Cut (Signed) |
| | WR | Signed (Signed) |
| | CB | Signed (Signed) |
| | WR | Signed (Signed) |
| | TE | Signed (Signed) |
| | LB | Signed (Signed) |
| | LB | Signed (Signed) |
| | S | Signed (Signed) |
| | FS | Signed (Signed) |
| | WR | Signed (Signed) |
| | S | Signed (Signed) |
| | WR | Signed/draft choice (Four-year contract (through 2025)) |
| | TE | Signed (Signed) |
| | DT | Signed (Signed) |
| | WR | Signed/draft choice (Four-year contract (through 2025)) |
| | CB | Signed/draft choice (Four-year contract (through 2025)) |
| | G | Signed (Signed) |
| | LB | Signed/draft choice (Four-year contract (through 2025)) |
| | S | Signed (Signed) |
| | QB | Signed (Signed) |
| | DT | Cut (Signed) |
| | S | Signed (One-year contract (through 2022)) |
| | DE | Team declines option (Fifth-year option on rookie contract) |
| | DL | Signed/unrest FA (One-year contract (through 2022)) To |
| | CB | Signed/unrest FA (One-year contract (through 2022)) To |
| | DB | Declared Free Agent (Signed) |
| | QB | Re-signed/unrest FA (One-year contract (through 2022)) |
| | C | Re-signed/excl. FA (One-year contract (through 2022)) |
| | LB | Re-signed/excl. FA (One-year contract (through 2022)) |
| | CB | Re-signed/excl. FA (One-year contract (through 2022)) |
| | SS | Re-signed/excl. FA (One-year contract (through 2022)) |
| | LB | Re-signed/excl. FA (One-year contract (through 2022)) |
| | DT | Re-signed/excl. FA (One-year contract (through 2022)) |
| | WR | Re-signed/excl. FA (One-year contract (through 2022)) |
| | QB | Re-signed/unrest FA (One-year contract (through 2022)) |
| | G | Re-signed/rest FA (One-year contract (through 2022)) |
| | TE | Team exercises option (Fifth-year option on rookie contract) |
| | C | Signed/unrest FA (One-year contract (through 2022)) To |
| | LB | Signed (Five-year contract (through 2026)) To |
| | DE | Signed (One-year contract (through 2022)) To |
| | LB | Signed/unrest FA (One-year contract (through 2022)) From |
| | CB | Signed/unrest FA (One-year contract (through 2022)) From |
| | TE | Signed/unrest FA (Two-year contract (through 2023)) To |
| | RB | Re-signed/unrest FA (One-year contract (through 2022)) |
| | DE | Signed/unrest FA (Two-year contract (through 2023)) From |
| | OLB | Re-signed/unrest FA (One-year contract (through 2022)) |
| | DE | Cut (Signed) |
| | DE | Cut (Signed) |
| | CB | Signed/unrest FA (Three-year contract (through 2024)) To |
| | LB | Signed/unrest FA (Two-year contract (through 2023)) From |
| | OLB | Signed/unrest FA (Two-year contract (through 2023)) To |
| | QB | Traded (for 3 players and multiple draft picks) To |
| | DE | Declared Free Agent (Signed) |
| | WR | Declared Free Agent (Signed) |
| | CB | Declared Free Agent (Signed) |
| | DE | Traded (for Russell Wilson and fourth-round pick) From |
| | CB | Declared Free Agent (Signed) |
| | G | Signed/unrest FA (One-year contract (through 2022)) From |
| | TE | Traded (for Russell Wilson and fourth-round pick) From |
| | QB | Traded (for Russell Wilson and fourth-round pick) From |
| | RB | Declared Free Agent (Signed) |
| | QB | Declared Free Agent (Signed) |
| | OLB | Declared Free Agent (Signed) |
| | OLB | Declared Free Agent (Signed) |
| | C | Declared Free Agent (Signed) |
| | CB | Declared Free Agent (Signed) |
| | RB | Declared Free Agent (Signed) |
| | G | Restricted Free Agent (Signed) |
| | DL | Declared Free Agent (Signed) |
| | OLB | Declared Free Agent (Signed) |
| | CB | Signed/unrest FA (One-year contract (through 2022)) From |
| | DL | Declared Free Agent (Signed) |
| | TE | Declared Free Agent (Signed) |
| | T | Declared Free Agent (Signed) |
| | DE | Cut (Signed) |
| | FS | Re-signed (Three-year contract (through 2024)) |
| | DT | Re-signed (Two-year contract (through 2023)) |
| | CB | Re-signed (One-year contract (through 2022)) |
| | TE | Re-signed (Three-year contract (through 2024)) |
| | LB | Cut (Signed) |