| | D | Signed (The Washington Capitals Signed D Leon Muggli to an entry-level contract.) |
| | D | Signed (The Washington Capitals signed D Cameron Allen to a standard contract.) |
| | RW | Signed (The Washington Capitals signed F Terik Parascak to an entry-level contract.) |
| | D | Re-Signed (The Washington Capitals re-signed D Hardy Haman Aktell.) |
| | C | Re-Signed (The Washington Capitals re-signed F Alex Limoges to a one-year, two-way contract.) |
| | C | Signed (The Washington Capitals signed F Luke Philp to a two-way contract.) |
| | RW | Signed (The Washington Capitals signed F Brandon Duhaime to a standard contract.) |
| | D | Signed (The Washington Capitals traded D Nick Jensen to the Ottawa Senators.) To |
| | C | Signed (The Washington Capitals signed F Ethen Frank.) |
| | G | Signed (The Washington Capitals signed G Mitchell Gibson to a two-way contract.) |
| | D | Traded (The Ottawa Senators traded D Jakob Chychrun to the Washington Capitals.) From |
| | D | Signed (The Washington Capitals signed D Chase Priskie to a two-way contract.) |
| | RW | Signed (The Washington Capitals signed F Taylor Raddysh to a standard contract.) |
| | D | Signed (The Washington Capitals signed D Matt Roy to a standard contract.) |
| | RW | Became Unrestricted Free Agent (F Nicolas Aube-Kubel elected free agency.) |
| | C | Became Unrestricted Free Agent (F Joe Snively elected free agency.) |
| | LW | Traded (The Washington Capitals traded F Beck Malestyn to the Buffalo Sabres) To |
| | C | Drafted (The Washington Capitals drafted F Petr Sikora.) |
| | G | Traded (The Vegas Golden Knights traded G Logan Thompson to the Washington Capitals) From |
| | D | Drafted (The Washington Capitals drafted D Leon Muggli) |
| | LW | Drafted (The Washington Capitals drafted LW Eriks Mateiko) |
| | LW | Drafted (The Washington Capitals drafted LW Ilya Protas) |
| | G | Drafted (The Washington Capitals drafted G Nicholas Kempf) |
| | C | Drafted (The Washington Capitals drafted F Miroslav Satan.) |
| | D | Drafted (The Washington Capitals drafted D Cole Hutson) |
| | LW | Became Unrestricted Free Agent (F Max Pacioretty elected free agency.) |
| | D | Became Unrestricted Free Agent (D Chase Priskie elected free agency.) |
| | RW | Drafted (The Washington Capitals drafted F Terik Parascak.) |
| | LW | Traded (The Calgary Flames traded F Andrew Mangiapane to the Washington Capitals.) From |
| | C | Traded (The Los Angeles Kings traded F Pierre-Luc Dubois to the Washington Capitals.) From |
| | G | Traded (The Washington Capitals traded G Darcy Kuemper to the Los Angeles Kings.) To |
| | D | Activated (The Washington Capitals activated D Ethan Bear.) |
| | LW | Sent to minors (The Washington Capitals sent F Ivan Miroshnichenko to the minors.) |
| | D | Sent to minors (The Washington Capitals sent D Lucas Johansen to the minors.) |
| | D | Sent to minors (The Washington Capitals sent D Vincent Iorio to the minors.) |
| | G | Sent to minors (The Washington Capitals sent G Mitchell Gibson to the minors.) |
| | D | Sent to minors (The Washington Capitals sent D Hardy Haman Aktell to the minors.) |
| | C | Sent to minors (The Washington Capitals sent F Hendrix Lapierre to the minors.) |
| | D | Sent to minors (The Washington Capitals sent D Dylan McIlrath to the minors.) |
| | D | Called up from minors (The Washington Capitals recalled D Hardy Haman Aktell from the minors.) |
| | G | Called up from minors (The Washington Capitals recalled G Mitchell Gibson from the minors.) |
| | D | Called up from minors (The Washington Capitals recalled D Dylan Mcilrath from the minors.) |
| | D | Called up from minors (The Washington Capitals recalled D Lucas Johansen from the minors.) |
| | C | Sent to minors (The Washington Capitals assigned F Matthew Phillips to the minors.) |
| | G | Sent to minors (The Washington Capitals assigned G Hunter Shepard to the minors.) |
| | C | Called up from minors (The Washington Capitals recalled F Matthew Phillips from the minors.) |
| | G | Called up from minors (The Washington Capitals recalled G Hunter Shepard from the minors.) |
| | C | Sent to minors (The Washington Capitals assigned F Matthew Phillips to the minors.) |
| | C | Called up from minors (The Washington Capitals recalled F Matthew Phillips from the minors.) |
| | C | Sent to minors (The Washington Capitals sent F Matthew Phillips to the minors.) |
| | C | Called up from minors (The Washington Capitals recalled F Matthew Phillips from the minors.) |
| | D | Called up from minors (The Washington Capitals recalled D Vincent Iorio from the minors.) |
| | C | Sent to minors (The Washington Capitals assigned F Matthew Phillips to the minors.) |
| | C | Activated (The Washington Capitals activated F Nic Dowd from injured reserve.) |
| | D | Activated (The Washington Capitals activated D Martin Fehervary from injured reserve.) |
| | RW | Activated (The Washington Capitals activated F T.J. Oshie from injured reserve. ) |
| | G | Sent to minors (The Washington Capitals assigned G Hunter Shepard to the minors.) |
| | D | Traded (The Toronto Maple Leafs acquired D Joel Edmundson in a trade with Washington. ) To |
| | G | Called up from minors (The Washington Capitals recalled D Hunter Shepard from the minors.) |
| | C | Claimed (The Washington Capitals claimed F Matthew Phillips off waivers.) |
| | RW | Traded (The Washington Capitals traded F Anthony Mantha to the Vegas Golden Knights.) To |
| | C | Claimed (The Washington Capitals claimed F Matthew Phillips.) |
| | C | Sent to minors (The Washington Capitals assigned F Matthew Phillips to the minors.) |
| | RW | Sent to minors (The Washington Capitals assigned F Pierrick Dube to the minors.) |
| | C | Activated (The Washington Capitals announced F Evgeny Kuznetsov has been cleared to resume practicing with the team.) |
| | C | Waived (The Washington Capitals waived F Evgeny Kuznetsov.) |
| | LW | Called up from minors (The Washington Capitals recalled F Ivan Miroshnichenko.) |
| | RW | Placed on Injured Reserve (The Washington Capitals placed F T.J. Oshie on Injured Reserve.) |
| | C | Called up from minors (The Washington Capitals recalled F Hendrix Lapierre from the minors.) |
| | C | Placed on Injured Reserve (The Washington Capitals placed F Nic Dowd on Injured Reserve.) |
| | D | Placed on Injured Reserve (The Washington Capitals placed D Martin Fehérváry on the Long-Term Injured Reserve.) |
| | LW | Activated (The Washington Capitals activated F Sonny Milano from Injured Reserve.) |
| | C | Claimed (The Pittsburgh Penguins claimed F Matthew Phillips off waivers from the Washington Capitals.) To |
| | C | Waived (The Washington Capitals waived F Matthew Phillips.) |
| | C | Waived (The Washington Capitals waived F Matthew Phillips.) |
| | C | Not With Team (The Washington Capitals placed F Evgeny Kuznetsov on the non-roster list.) |
| | C | Called up from minors (The Washington Capitals recalled F Michael Sgarbossa.) |
| | C | Sent to minors (The Washington Capitals assigned F Henrik Rybinski to the minors.) |
| | D | Activated (The Washington Capitals activated D Rasmus Sandin.) |
| | RW | Activated (The Washington Capitals activated F T.J. Oshie from injured reserve.) |
| | D | Placed on Injured Reserve (The Washington Capitals placed D Rasmus Sandin on injured reserve.) |
| | G | Activated (The Washington Capitals activated G Charlie Lindgren.) |
| | G | Sent to minors (The Washington Capitals assigned G Hunter Shepard to the minors.) |
| | LW | Activated (The Washington Capitals activated F Max Pacioretty.) |
| | G | Placed on Injured Reserve (The Washington Capitals placed G Charlie Lindgren on Injured Reserve.) |
| | G | Called up from minors (The Washington Capitals recalled G Hunter Shepard from the minors.) |
| | LW | Sent to minors (The Washington Capitals assigned F Ivan Miroshnichenko to the minors.) |
| | D | Signed (The Washington Capitals signed D Ethan Bear.) |
| | C | Called up from minors (The Washington Capitals recalled F Hendrix Lapierre.) |
| | LW | Called up from minors (The Washington Capitals recalled F Ivan Miroshnichenko.) |
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