| | D | Signed (The New Jersey Devils signed D Santeri Hatakka to a one-year, two-way contract.) |
| | RW | Signed (The New Jersey Devils signed F Cam Squires to a three-year, entry-level contract.) |
| | LW | Signed (The New Jersey Devils signed F Adam Beckman to a one-year, two-way contract.) |
| | LW | Signed (The New Jersey Devils signed F Tomas Tatar to a standard contract.) |
| | D | Signed (The New Jersey Devils signed D Brenden Dillon to a standard contract.) |
| | RW | Signed (The New Jersey Devils signed F Mike Hardman to a two-way contract.) |
| | D | Signed (The New Jersey Devils signed D Brett Pesce to a standard contract.) |
| | D | Signed (The New Jersey Devils signed D Colton White.) |
| | RW | Signed (The New Jersey Devils signed F Stefan Noesen to a standard contract.) |
| | C | Became Unrestricted Free Agent (F Michael McLeod elected free agency.) |
| | D | Traded (The Mintreal Canadiens traded D Johnathan Kovacevic to the New Jersey Devils.) From |
| | G | Became Unrestricted Free Agent (G Kaapo Kahkonen elected free agency.) |
| | LW | Became Unrestricted Free Agent (F Tomas Nosek elected free agency.) |
| | D | Became Unrestricted Free Agent (D Brendan Smith elected free agency.) |
| | RW | Traded (The New Jersey Devils traded F Alexander Holtz to the Vegas Golden Knights) To |
| | G | Traded (The New Jersey Devils traded G Akira Schmid to the Vegas Golden Knights) To |
| | C | Drafted (The New Jersey Devils drafted C Max Graham) |
| | D | Became Unrestricted Free Agent (D Tyler Wotherspoon elected free agency.) |
| | C | Became Unrestricted Free Agent (F Chris Tierney elected free agency.) |
| | D | Traded (The New Jersey Devils traded D John Marino to the Utah Hockey Club) To
|
| | C | Traded (The Vegas Golden Knights traded F Paul Cotter to the New Jersey Devils.) From |
| | G | Became Unrestricted Free Agent (G Keith Kinkaid elected free agency.) |
| | G | Drafted (The New Jersey Devils drafted G Veeti Louhivaara) |
| | C | Became Unrestricted Free Agent (F Kyle Criscuolo elected free agency.) |
| | RW | Drafted (The New Jersey Devils drafted RW Herman Traff) |
| | G | Drafted (The New Jersey Devils drafted G Mikhail Yegorov) |
| | G | Became Unrestricted Free Agent (G Erik Kallgren elected free agency.) |
| | RW | Drafted (The New Jersey Devils drafted RW Kasper Pikkarainen) |
| | C | Drafted (The New Jersey Devils drafted C Matyas Melovsky) |
| | D | Drafted (The New Jersey Devils drafted D Anton Silayev) |
| | D | Signed (The New Jersey Devils signed D Nick DeSimone.) |
| | LW | Traded (The Minnesota Wild traded F Adam Beckman to the New Jersey Devils.) |
| | LW | Traded (The Minnesota Wild traded F Adam Beckman to the New Jersey Devils.) |
| | RW | Traded (The New Jersey Devils traded F Graeme Clarke to the Minnesota Wild.) To |
| | D | Traded (The New Jersey Devils traded D Kevin Bahl to the Calgary Flames.) To |
| | G | Traded (The Calgary Flames traded G Jacob Markstrom to the New Jersey Devils.) From |
| | D | Contract extended (The New Jersey Devils signed D Kurtis MacDermid to a three-year extension.) |
| | LW | Re-Signed (The New Jersey Devils re-signed F Samuel Laberge to a one-year, two-way contract.) |
| | LW | Re-Signed (The New Jersey Devils re-signed F Brian Halonen to a two-year, two-way contract.) |
| | RW | Re-Signed (The New Jersey Devils re-signed F Nathan Legare to a one-year, two-way contract.) |
| | G | Signed (The New Jersey Devils signed G Jakub Malek to a two-year, entry-level contract.) |
| | C | Re-Signed (The New Jersey Devils re-signed F Max Willman to a one-year, two-way contract.) |
| | D | Signed (The New Jersey Devils signed D Seamus Casey to a three-year, entry-level contract.) |
| | C | Signed (The New Jersey Devils signed F Ryan Schmelzer to a two-way deal.) |
| | C | Signed (The New Jersey Devils signed F Shane Bowers to a two-year, two-way contract. ) |
| | C | Sent to minors (The New Jersey Devils sent F Shane Bowers to the minors.) |
| | RW | Sent to minors (The New Jersey Devils sent F Graeme Clarke to the minors.) |
| | RW | Called up from minors (The New Jersey Devils recalled F Graeme Clarke from the minors.) |
| | G | Sent to minors (The New Jersey Devils sent G Akira Schmid to the minors.) |
| | LW | Sent to minors (The New Jersey Devils sent F Brian Halonen to the minors.) |
| | G | Called up from minors (The New Jersey Devils recalled G Akira Schmid from the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Shane Bowers from the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Shane Bowers from the minors.) |
| | C | Sent to minors (The New Jersey Devils sent F Max Willman to the minors.) |
| | | Sent to minors (The New Jersey Devils assigned F Dylan Wendt to the minors.) |
| | D | Sent to minors (The New Jersey Devils assigned D Santeri Hatakka to the minors.) |
| | G | Sent to minors (The New Jersey Devils assigned G Isaac Poulter to the minors.) |
| | LW | Called up from minors (The New Jersey Devils recalled F Brian Halonen from the minors.) |
| | D | Sent to minors (The New Jersey Devils assigned D Tyler Wotherspoon to the minors.) |
| | G | Called up from minors (The New Jersey Devils recalled G Isaac Poulter from the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Max Willman from the minors.) |
| | D | Called up from minors (The New Jersey Devils recalled D Santeri Hatakka from the minors.) |
| | D | Called up from minors (The New Jersey Devils recalled D Tyler Wotherspoon from the minors.) |
| | G | Sent to minors (The New Jersey Devils sent G Nico Daws to the minors.) |
| | D | Sent to minors (The New Jersey Devils reassigned D Tyler Wotherspoon to the minors.) |
| | C | Sent to minors (The New Jersey Devils reassigned F Max Willman to the minors.) |
| | D | Sent to minors (The New Jersey Devils reassigned D Santeri Hatakka to the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Max Willman from the minors.) |
| | D | Called up from minors (The New Jersey Devils recalled D Tyler Wotherspoon from the minors.) |
| | D | Called up from minors (The New Jersey Devils recalled D Santeri Hatakka from the minors.) |
| | LW | Called up from minors (The New Jersey Devils recalled F Nolan Foote from his conditioning loan with the minors.) |
| | G | Traded (The San Jose Sharks traded G Kaapo Kahkoken to the New Jersey Devils.) From |
| | D | Traded (The New Jersey Devils traded D Colin Miller to the Winnipeg Jets.) To |
| | G | Sent to minors (The New Jersey Devils assigned G Akira Schmid to the minors.) |
| | G | Traded (The New Jersey Devils traded G Vitek Vanecek to the San Jose Sharks.) To |
| | G | Traded (The Montreal Canadiens traded G Jake Allen to the New Jersey Devils.) From |
| | RW | Traded (The New Jersey Devils traded F Tyler Toffoli to the Winnipeg Jets.) To |
| | D | Signed (The New Jersey Devils signed D Mikael Diotte to an entry level contract.) |
| | LW | Sent to minors (The New Jersey Devils assigned F Brian Halonen to the minors.) |
| | C | Traded (The New Jersey Devils traded the signing rights of F Zakhar Bardakov to the Colorado Avalanche.) To |
| | D | Traded (The Colorado Avalanche traded D Kurtis MacDermid to the New Jersey Devils.) From |
| | G | Sent to minors (The New Jersey Devils assigned G Isaac Poulter to the minors.) |
| | G | Called up from minors (The New Jersey Devils recalled G Akira Schmid from the minors.) |
| | RW | Placed on Injured Reserve (The New Jersey Devils placed F Nathan Bastian on Injured Reserve.) |
| | LW | Called up from minors (The New Jersey Devils recalled F Brian Halonen from the minors.) |
| | G | Sent to minors (The New Jersey Devils assigned G Akira Schmid to the minors.) |
| | G | Called up from minors (Signed) |
| | G | Called up from minors (Signed) |
| | D | Activated (The New Jersey Devils activated D Jonas Siegenthaler.) |
| | G | Placed on Injured Reserve (The New Jersey Devils placed G Vitek Vanecek on injured reserve.) |
| | D | Sent to minors (The New Jersey Devils assigned D Santeri Hatakka to the minors.) |
| | D | Activated (The New Jersey Devils activated D Brendan Smith off Injured Reserve.) |
| | G | Called up from minors (The New Jersey Devils recalled G Akira Schmid from the minors.) |
| | C | Waived (The New Jersey Devils waived F Max Willman.) |
| | C | Activated (The New Jersey Devils activated F Jack Hughes.) |
| | LW | Activated (The New Jersey Devils activated F Tomas Nosek.) |
| | D | Called up from minors (The New Jersey Devils recalled D Santeri Hatakka from the minors.) |
| | D | Sent to minors (The New Jersey Devils assigned D Santeri Hatakka to the minors.) |
| | C | Sent to minors (The New Jersey Devils assigned F Justin Dowling to the minors.) |
| | D | Sent to minors (The New Jersey Devils assigned D Daniil Misyul to the minors.) |
| | C | Granted Leave of Absence (The New Jersey Devils added F Michael McLeod to the non-roster list.) |
| | D | Granted Leave of Absence (The New Jersey Devils placed D Cal Foote on the non-roster list.) |
| | C | Called up from minors (The New Jersey Devils recalled F Justin Dowling.) |
| | D | Claimed (The New Jersey Devils claimed D Nick DeSimone.) |
| | D | Called up from minors (The New Jersey Devils recalled D Daniil Misyul.) |
| | C | Placed on Injured Reserve (The New Jersey Devils placed F Jack Hughes on injured reserve.) |
| | D | Granted Leave of Absence (D Cal Foote was granted a leave of absence from the team.) |
| | C | Granted Leave of Absence (F Michael McLeod was granted a leave of absence from the team.) |
| | D | Called up from minors (The New Jersey Devils recalled D Santeri Hatakka.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Brendan Smith on injured reserve.) |
| | C | Sent to minors (The New Jersey Devils assigned F Shane Bowers to the minors.) |
| | RW | Activated (The New Jersey Devils activated F Timo Meier.) |
| | D | Called up from minors (The New Jersey Devils recalled D Cal Foote.) |
| | C | Called up from minors (The New Jersey Devils recalled F Max Willman from the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Shane Bowers.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Jonas Siegenthaler on injured reserve.) |
| | C | Sent to minors (The New Jersey Devils assigned F Max Willman to the minors.) |
| | RW | Sent to minors (The New Jersey Devils assigned F Graeme Clarke to the minors.) |
| | C | Called up from minors (The New Jersey Devils recalled F Max Willman from the minors.) |
| | RW | Placed on Injured Reserve (The New Jersey Devils placed F Timo Meier on injured reserve.) |
| | C | Called up from minors (The New Jersey Devils recalled F Max Willman from the minors.) |
| | RW | Called up from minors (The New Jersey Devils recalled F Graeme Clarke.) |
| | LW | Activated (The New Jersey Devils activated F Brian Halonen from the Injured Reserve.) |
| | LW | Sent to minors (The New Jersey Devils sent F Brian Halonen to the minors.) |
| | G | Sent to minors (The New Jersey Devils assigned G Akira Schmid to the minors.) |
| | G | Called up from minors (The New Jersey Devils recalled G Nico Daws.) |
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