| | D | Called up from minors (The New Jersey Devils recalled D Nick DeSimone from the minors.) |
| | D | Sent to minors (The New Jersey Devils sent D Simon Nemec to the minors.) |
| | D | Sent to minors (The New Jersey Devils sent D Topias Vilen to the minors.) |
| | D | Activated (The New Jersey Devils activated D Topias Vilen from injured reserve.) |
| | C | Called up from minors (The New Jersey Devils recalled F Justin Dowling from the minors.) |
| | D | Sent to minors (The New Jersey Devils sent D Daniil Misyul to the minors.) |
| | D | Activated (The New Jersey Devils activated D Luke Hughes from injured reserve.) |
| | D | Activated (The New Jersey Devils activated D Brett Pesce from injured reserve.) |
| | D | Sent to minors (The New Jersey Devils sent D Seamus Casey to the minors.) |
| | D | Called up from minors (The New Jersey Devils recalled D Daniil Misyul from the minors.) |
| | LW | Waived (The New Jersey Devils waived F Adam Beckman.) |
| | LW | Waived (The New Jersey Devils waived F Adam Beckman.) |
| | LW | Activated (The New Jersey Devils activated F Adam Beckman from injured reserve.) |
| | RW | Sent to minors (The New Jersey Devils sent F Josh Filmon to the minors.) |
| | RW | Activated (The New Jersey Devils activated F Josh Filmon from injured reserve non-roster.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Santeri Hatakka on injured reserve.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Brett Pesce on injured reserve.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Topias Vilen on injured reserve.) |
| | RW | Placed on Injured Reserve (The New Jersey Devils placed F Josh Filmon on injured reserve.) |
| | LW | Placed on Injured Reserve (The New Jersey Devils placed F Adam Beckman on injured reserve.) |
| | D | Placed on Injured Reserve (The New Jersey Devils placed D Luke Hughes on injured reserve.) |
| | D | Sent to minors (The New Jersey Devils sent D Colton White to the minors.) |
| | C | Sent to minors (The New Jersey Devis sent F Shane Bowers to the minors.) |
| | LW | Sent to minors (The New Jersey Devils sent F Nolan Foote to 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 sent D Nick DeSimone to the minors.) |
| | RW | Signed (The Columbus Blue Jackets signed F Kevin Labanc.) To |
| | RW | Waived (The New Jersey Devils waived F Mike Hardman.) |
| | D | Activated (The New Jersey Devils activated D Dougie Hamilton from Injured Reserve.) |
| | C | Sent to minors (The New Jersey Devils sent F Tag Bertuzzi to the minors.) |
| | RW | Sent to minors (The New Jersey Devils sent F Andre Ghantous to the minors.) |
| | RW | Sent to minors (The New Jersey Devils sent F Kevin O'Neil to the minors.) |
| | G | Sent to minors (The New Jersey Devils sent G Tyler Brennan to the minors.) |
| | | Sent to minors (The New Jersey Devils sent F Dylan Wendt to the minors.) |
| | D | Released (The New Jersey Devils released D Igor Mburanumwe.) |
| | C | Sent to minors (The New Jersey Devils sent F Jace Isley to the minors.) |
| | RW | Released (The New Jersey Devils released F Landon Sim.) |
| | G | Released (The New Jersey Devils released G Michael Hutchinson.) |
| | RW | Sent to minors (The New Jersey Devils sent F Kasper Pikkarainen to the minors.) |
| | LW | Sent to minors (The New Jersey Devils sent F Cole Brown to the minors.) |
| | G | Released (The New Jersey Devils released G Zach Pelletier.) |
| | D | Released (The New Jersey Devils released D Spencer Sova.) |
| | RW | Signed (The New Jersey Devils signed F Kevin Labanc to a professional tryout contract.) |
| | D | Signed (The New Jersey devils signed D Andy Welinski to a professional tryout contract.) |
| | RW | Signed (The New Jersey Devils signed F Josh Filmon to a rookie camp roster.) |
| | G | Signed (The New jersey Devils signed G Michael Hutchinson to a professional tryout contract.) |
| | D | Signed (The New Jersey Devils signed D Jakub Zboril to a professional tryout contract.) |
| | RW | Activated (The New Jersey Devils activated F Nathan Bastian.) |
| | G | Re-Signed (The New Jersey Devils re-signed G Nico Daws.) |
| | 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 |
| | LW | 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.) |
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