Transactions
| Date | Player | Pos | Transactions |
| 12/7 | Scott Harrington | D | Waived |
| 12/2 | Daniil Tarasov | G | Called up from minors from Cleveland-AHL |
| 12/2 | Emil Bemstrom | RW | Sent to minors Cleveland-AHL |
| 12/2 | Joonas Korpisalo | G | Placed on IR Illness |
| 11/19 | Kevin Stenlund | RW | Sent to minors Cleveland-AHL |
| 11/15 | Trey Fix-Wolansky | RW | Sent to minors Cleveland-AHL |
| 11/14 | Justin Danforth | C | Called up from minors from Cleveland-AHL |
| 11/3 | Patrik Laine | LW | Placed on IR Strained oblique - left game |
| 11/1 | Kevin Stenlund | C | Called up from minors from Cleveland-AHL |
| 11/1 | Max Domi | LW | Placed on IR COVID-19 protocol |
| 10/28 | Justin Danforth | C | Sent to minors Cleveland-AHL |
| 10/26 | Gavin Bayreuther | D | Called up from minors from Cleveland-AHL |
| 10/26 | Dean Kukan | D | Placed on IR Fractured wrist |
| 10/20 | Gabriel Carlsson | D | Called up from minors from Cleveland-AHL |
| 10/18 | Max Domi | LW | Placed on IR Fractured rib |
| 10/17 | Yegor Chinakhov | RW | Called up from minors from Cleveland-AHL |
| 10/17 | Mikko Lehtonen | D | Signed with European team SKA St. Petersburg-KHL |
| 10/16 | Justin Danforth | C | Called up from minors from Cleveland-AHL |
| 10/15 | Yegor Chinakhov | RW | Sent to minors Cleveland-AHL |
| 10/13 | Mikko Lehtonen | D | Released |
| 10/12 | Mikko Lehtonen | D | Waived For purpose of contract termination |
| 10/12 | Emil Bemstrom | RW | Placed on IR Strained left oblique |
| 10/11 | Gabriel Carlsson | D | Sent to minors Cleveland-AHL |
| 10/11 | Kevin Stenlund | C | Sent to minors Cleveland-AHL |
| 10/11 | Mikko Lehtonen | D | Sent to minors Cleveland-AHL |
| 10/10 | Justin Danforth | C | Sent to minors Cleveland-AHL |
| 10/10 | Liam Foudy | RW | Sent to minors Cleveland-AHL |
| 10/10 | Daniil Tarasov | G | Sent to minors Cleveland-AHL |
| 10/10 | Gavin Bayreuther | D | Sent to minors Cleveland-AHL |
| 10/10 | Kevin Stenlund | C | Waived |
| 10/10 | Mikko Lehtonen | D | Waived |
| 10/10 | Gabriel Carlsson | D | Waived |
| 10/9 | Tristan Mullin | LW | Released |
| 10/9 | Justin Scott | C | Released |
| 10/9 | Carson Meyer | RW | Sent to minors Cleveland-AHL |
| 10/9 | Tyler Angle | C | Sent to minors Cleveland-AHL |
| 10/9 | Josh Dunne | C | Sent to minors Cleveland-AHL |
| 10/9 | Brendan Gaunce | LW | Sent to minors Cleveland-AHL |
| 10/9 | Tyler Sikura | C | Sent to minors Cleveland-AHL |
| 10/7 | Tyler Sikura | C | Called up from minors from Cleveland-AHL |
| 10/7 | Carson Meyer | RW | Called up from minors from Cleveland-AHL |
| 10/7 | Gavin Bayreuther | D | Called up from minors from Cleveland-AHL |
| 10/7 | Josh Dunne | C | Called up from minors from Cleveland-AHL |
| 10/7 | Tyler Angle | C | Called up from minors from Cleveland-AHL |
| 10/7 | Brendan Gaunce | LW | Called up from minors from Cleveland-AHL |
| 10/7 | Justin Scott | C | Invited to Training Camp |
| 10/7 | Tristan Mullin | LW | Invited to Training Camp |
| 10/5 | Gavin Bayreuther | D | Sent to minors Cleveland-AHL |
| 10/5 | J-F Berube | G | Sent to minors Cleveland-AHL |
| 10/5 | Tyler Sikura | C | Sent to minors Cleveland-AHL |
| 10/5 | Brendan Gaunce | LW | Sent to minors Cleveland-AHL |
| 10/4 | Evan Moyse | G | Released |
| 10/4 | Billy Sweezey | D | Released |
| 10/4 | Jet Greaves | G | Released |
| 10/4 | Giovanni Vallati | D | Released |
| 10/4 | Cole Cassels | C | Released |
| 10/4 | Cole Fonstad | C | Released |
| 10/4 | Brett Gallant | LW | Released |
| 10/4 | Jake Gaudet | C | Released |
| 10/4 | Adam Helewka | LW | Released |
| 10/4 | Zac Jordan | RW | Released |
| 10/4 | Tristan Mullin | LW | Released |
| 10/4 | Justin Scott | C | Released |
| 10/4 | Jake Slaker | C | Released |
| 10/4 | Cole Clayton | D | Released |
| 10/4 | Olivier Leblanc | D | Released |
| 10/4 | Thomas Schemitsch | D | Released |
| 10/4 | Dillon Simpson | D | Released |
| 10/4 | Navrin Mutter | LW | Released |
| 10/4 | Carson Meyer | RW | Sent to minors Cleveland-AHL |
| 10/4 | Josh Dunne | C | Sent to minors Cleveland-AHL |
| 10/4 | Tyler Angle | C | Sent to minors Cleveland-AHL |
| 10/4 | Tim Berni | D | Sent to minors Cleveland-AHL |
| 10/4 | Jake Christiansen | D | Sent to minors Cleveland-AHL |
| 10/4 | J-F Berube | G | Waived |
| 10/4 | Brendan Gaunce | LW | Waived |
| 10/4 | Tyler Sikura | C | Waived |
| 10/4 | Gavin Bayreuther | D | Waived |
| 10/1 | Cameron Johnson | G | Sent to minors Cleveland-AHL |
| 9/30 | Ben Boyd | LW | Assigned to Junior Club Charlottetown-QMJHL |
| 9/30 | Ole Holm | D | Assigned to Junior Club Mississauga-OHL |
| 9/30 | James Malatesta | LW | Assigned to Junior Club Quebec-QMJHL |
| 9/30 | Martin Rysavy | RW | Assigned to Junior Club Moose Jaw-WHL |
| 9/30 | Stanislav Svozil | D | Assigned to Junior Club Regina-WHL |
| 9/30 | Emerik Despatie | G | Released |
| 9/30 | Gerard Keane | D | Released |
| 9/30 | Mark Woolley | D | Released |
| 9/30 | Peter Reynolds | C | Released |
| 9/30 | Kaleb Lawrence | C | Released |
| 9/30 | J-F Berube | G | Signed as Free Agent One-year, two-way contract |
| 9/30 | Cameron Johnson | G | Waived |
| 9/30 | Zac Rinaldo | LW | Waived |
| 9/21 | Elvis Merzlikins | G | Contract extended Five-year contract extension |
| 9/21 | Cole Cassels | C | Invited to Training Camp |
| 9/21 | Adam Helewka | LW | Invited to Training Camp |
| 9/21 | Cole Fonstad | C | Invited to Training Camp |
| 9/21 | Brett Gallant | LW | Invited to Training Camp |
| 9/21 | Zac Jordan | RW | Invited to Training Camp |
| 9/21 | Jake Gaudet | C | Invited to Training Camp |
| 9/21 | Tristan Mullin | LW | Invited to Training Camp |
| 9/21 | Justin Scott | C | Invited to Training Camp |
| 9/21 | Kaleb Lawrence | C | Invited to Training Camp |
| 9/21 | Peter Reynolds | C | Invited to Training Camp |
| 9/21 | Navrin Mutter | LW | Invited to Training Camp |
| 9/21 | Jake Slaker | C | Invited to Training Camp |
| 9/21 | Billy Sweezey | D | Invited to Training Camp |
| 9/21 | Thomas Schemitsch | D | Invited to Training Camp |
| 9/21 | Dillon Simpson | D | Invited to Training Camp |
| 9/21 | Cole Clayton | D | Invited to Training Camp |
| 9/21 | Olivier Leblanc | D | Invited to Training Camp |
| 9/21 | Gerard Keane | D | Invited to Training Camp |
| 9/21 | Giovanni Vallati | D | Invited to Training Camp |
| 9/21 | Mark Woolley | D | Invited to Training Camp |
| 9/21 | J-F Berube | G | Invited to Training Camp |
| 9/21 | Emerik Despatie | G | Invited to Training Camp |
| 9/21 | Jet Greaves | G | Invited to Training Camp |
| 9/21 | Evan Moyse | G | Invited to Training Camp |
| 9/21 | Nathan Gerbe | LW | Placed on IR Hip |
| 9/21 | Trey Fix-Wolansky | RW | Placed on IR Knee |
| 8/18 | Cole Sillinger | C | Signed Three-year, entry-level contract |
| 8/16 | Ole Holm | D | Signed Three-year, entry-level contract |
| 8/13 | Stanislav Svozil | D | Signed Three-year, entry-level contract |
| 8/13 | Zac Rinaldo | LW | Signed as Free Agent One-year, two-way contract |
| 8/9 | Andrew Peeke | D | Re-Signed Two-year contract |
| 7/30 | Samuel Knazko | D | Assigned to European Team TPS Turku-Finland |
| 7/30 | Brendan Gaunce | LW | Signed as Free Agent One-year, two-way contract |
| 7/30 | Mikko Lehtonen | D | Signed as Free Agent One-year contract |
| 7/29 | Zach Werenski | D | Contract extended Six-year contract extension |
| 7/29 | Jake Bean | D | Re-Signed Three-year contract |
| 7/28 | Adam Clendening | D | Became Unrestricted Free Agent |
| 7/28 | Zac Dalpe | C | Became Unrestricted Free Agent |
| 7/28 | Ryan MacInnis | RW | Became Unrestricted Free Agent |
| 7/28 | Kole Sherwood | RW | Became Unrestricted Free Agent Not tendered a qualifying offer |
| 7/28 | Clifford Pu | RW | Became Unrestricted Free Agent Not tendered a qualifying offer |
| 7/28 | Daniel Zaar | RW | Became Unrestricted Free Agent |
| 7/28 | Stefan Matteau | LW | Became Unrestricted Free Agent |
| 7/28 | Mikko Lehtonen | D | Became Unrestricted Free Agent |
| 7/28 | Michael Del Zotto | D | Became Unrestricted Free Agent |
| 7/28 | Brandon Dubinsky | C | Became Unrestricted Free Agent |
| 7/28 | Mikhail Grigorenko | LW | Became Unrestricted Free Agent |
| 7/28 | Eric Robinson | LW | Contract extended Two-year contract extension |
| 7/28 | Boone Jenner | C | Contract extended Four-year contract extension |
| 7/28 | Alexandre Texier | C | Re-Signed Two-year contract |
| 7/28 | Patrik Laine | RW | Re-Signed One-year contract |
| 7/28 | Gavin Bayreuther | D | Signed as Free Agent Two-year, two-way contract |
| 7/28 | Tyler Sikura | C | Signed as Free Agent One-year, two-way contract |
| 7/28 | Sean Kuraly | LW | Signed as Free Agent Four-year contract |
| 7/24 | Jakub Voracek | RW | Traded for Cam Atkinson |
| 7/23 | Adam Boqvist | D | Traded w/ 3 picks for Seth Jones, 2 picks |
| 7/23 | Jake Bean | D | Traded for '21 2nd-rd pick |
| 7/15 | Cameron Johnson | G | Contract extended One-year, two-way contract extension |
| 7/4 | Matiss Kivlenieks | G | Deceased |
| 7/3 | Mikhail Grigorenko | LW | Signed with European team CSKA Moscow-KHL |
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