| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Derek Forbort from the minors.) |
| | D | Sent to minors (The Boston Bruins sent D Mason Lohrei to the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F John Beecher from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jayson Megna from the minors.) |
| | C | Sent to minors (The Boston Bruins sent F John Beecher to the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Jayson Megna to the minors.) |
| | D | Sent to minors (The Boston Bruins sent D Derek Forbort to the minors.) |
| | LW | Activated (The Boston Bruins activated F Pat Maroon from injured reserve.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors.) |
| | C | Signed (The Boston Bruins signed F Riley Duran to an entry-level contract.) |
| | C | Called up from minors (The Boston Bruins recalled F John Beecher from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F John Beecher to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F John Beecher from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F John Beecher to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Marc McLaughlin from the minors.) |
| | D | Activated (The Boston Bruins activated D Hampus Lindholm from injured reserve.) |
| | LW | Traded (The Minnesota Wild traded F Pat Maroon to the Boston Bruins.) From |
| | D | Placed on Injured Reserve (The Boston Bruins placed D Derek Forbort on long-term injured reserve.) |
| | D | Traded (The Columbus Blue Jackets traded D Andrew Peeke to the Boston Bruins.) From |
| | C | Sent to minors (The Boston Bruins assigned F Marc McLaughlin to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Marc McLaughlin from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Anthony Richard to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ian Mitchell to the minors.) |
| | RW | Called up from minors (The Boston Bruins recalled F Justin Brazeau from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell from the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Justin Brazeau to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | RW | Signed (The Boston Bruins signed F Justin Brazeau to a standard contract.) |
| | C | Waived (The Boston Bruins waived F Oskar Steen.) |
| | C | Called up from minors (The Boston Bruins recalled F Anthony Richard from the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Anthony Richard to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Anthony Richard from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Anthony Richard to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Anthony Richard.) |
| | C | Sent to minors (The Boston Bruins assigned F Patrick Brown to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F John Beecher to the minors.) |
| | D | Activated (The Boston Bruins activated D Derek Forbort from injured reserve.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors.) |
| | D | Activated (The Boston Bruins activated D Brandon Carlo from Injured Reserve.) |
| | G | Sent to minors (The Boston Bruins assigned G Brandon Bussi to the minors.) |
| | D | Placed on Injured Reserve (The Boston Bruins placed D Brandon Carlo on Injured Reserve.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jesper Boqvist from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Parker Wotherspoon from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Parker Wotherspoon from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jesper Boqvist from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Georgii Merkulov to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Matthew Poitras from the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Patrick Brown to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Georgii Merkulov from the minors.) |
| | D | Waived (The Boston Bruins waived D Ian Mitchell.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | D | Sent to minors (The Boston Bruins sent D Parker Wotherspoon to the minors.) |
| | D | Sent to minors (The Boston Bruins sent D Mason Lohrei to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors.) |
| | D | Activated (The Boston Bruins activated D Charlie McAvoy.) |
| | C | Activated (The Boston Bruins activated F Pavel Zacha.) |
| | C | Sent to minors (The Boston Bruins assigned F Matthew Poitras to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ian Mitchell to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Jesper Boqvist to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Parker Wotherspoon from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors.) |
| | D | Placed on Injured Reserve (The Boston Bruins placed D Charlie McAvoy on Injured Reserve.) |
| | C | Placed on Injured Reserve (The Boston Bruins placed F Pavel Zacha on Injured Reserve.) |
| | D | Waived (The Boston Bruins waived D Jakub Zboril.) |
| | C | Called up from minors (The Boston Bruins recalled F Jesper Boqvist.) |
| | G | Sent to minors (The Boston Bruins sent G Brandon Bussi to the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi from the minors.) |
| | D | Placed on Injured Reserve (The Boston Bruins placed D Derek Forbort on injured reserve.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell from the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ian Mitchell to the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Patrick Brown to the minors.) |
| | D | Sent to minors (The Boston Bruins sent D Mason Lohrei to the minors.) |
| | D | Activated (The Boston Bruins activated D Matt Grzelcyk from Injured Reserve.) |
| | C | Activated (The Boston Bruins actived F Morgan Geekie.) |
| | LW | Granted Leave of Absence (The Bruins announced that Lucic will take an indefinite leave of absence after being involved in an alleged domestic incident.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell from the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ian Mitchell to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Oskar Steen to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Parker Wotherspoon to the minors.) |
| | D | Suspension Over (The Boston Bruins reinstated D Charlie McAvoy from suspension.) |
| | C | Placed on Injured Reserve (The Boston Bruins placed F Morgan Geekie on the Injured Reserve.) |
| | C | Activated (The Boston Bruins activated F Jakub Lauko from the Injured Reserve.) |
| | D | Suspended (The NHL suspended D Charlie McAvoy for four games.) |
| | D | Called up from minors (The Boston Bruins recalled D Parker Wotherspoon.) |
| | D | Placed on Injured Reserve (The Boston Bruins placed D Matt Grzelcyk on injured reserve.) |
| | D | Called up from minors (The Boston Bruins recalled D Ian Mitchell.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei.) |
| | C | Placed on Injured Reserve (The Boston Bruins placed F Jakub Lauko on injured reserve.) |
| | D | Suspended (The National Hockey League suspended D Charlie McAvoy for four games.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors. ) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors. ) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen from the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Jakub Zboril from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Jesper Boqvist to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Mason Lohrei from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Patrick Brown to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jesper Boqvist.) |
| | D | Waived (The Boston Bruins waived D Ian Mitchell.) |
| | C | Sent to minors (The Boston Bruins assigned F Patrick Brown to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Patrick Brown.) |
| | D | Sent to minors (The Boston Bruins assigned D Mason Lohrei to the minors. ) |
| | C | Waived (The Boston Bruins waived F Patrick Brown.) |
| | LW | Waived (The Boston Bruins waived F A.J. Greer.) |
| | C | Sent to minors (The Boston Bruins assigned F Jesper Boqvist to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Jakub Zboril to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Oskar Steen to the minors.) |
| | G | Sent to minors (The Boston Bruins assigned G Brandon Bussi to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Georgii Merkulov to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Marc McLaughlin to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Trevor Kuntar to the minors.) |
| | C | Waived (The Boston Bruins waived F Jayson Megna.) |
| | D | Sent to minors (The Boston Bruins assigned D Dan Renouf to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Parker Wotherspoon to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Reilly Walsh to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Alec Regula to the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Fabian Lysell to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Anthony Richard to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Michael Callahan to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F John Farinacci to the minors.) |
| | G | Waived (The Boston Bruins waived G Kyle Keyser.) |
| | G | Sent to minors (The Boston Bruins assigned G Michael DiPietro to the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Alex Chiasson to the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Brett Harrison to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Frederic Brunet to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ryan Mast to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Jackson Edward to the minors.) |
| | LW | Sent to minors (The Boston Bruins assigned F Joey Abate to the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Curtis Hall to the minors.) |
| | LW | Sent to minors (The Boston Bruins assigned F Owen Pederson to the minors.) |
| | LW | Sent to minors (The Boston Bruins assigned F Vincent Arseneau to the minors.) |
| | G | Sent to minors (The Boston Bruins assigned G Shane Starrett to the minors.) |
| | LW | Sent to minors (The Boston Bruins sent F Luke Toporowski to the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Justin Brazeau to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Ethan Ritchie to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Georgii Merkulov from the minors.) |
| | LW | Called up from minors (The Boston Bruins recalled F Vincent Arseneau from the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Kristian Kostadinski to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Marc McLaughlin from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Dan Renouf from the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Shane Starrett from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Michael Callahan from the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Michael DiPietro from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Matthew Poitras from the minors.) |
| | LW | Called up from minors (The Boston Bruins recalled F Joey Abate from the minors.) |
| | RW | Called up from minors (The Boston Bruins recalled F Fabian Lysell from the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Kyle Keyser from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Curtis Hall from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Ryan Walsh to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F John Beecher from the minors.) |
| | RW | Called up from minors (The Boston Bruins recalled F Justin Brazeau from the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Casper Nassen to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Jackson Edward from the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Beckett Hendrickson to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Brett Harrison from the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Frederic Brunet from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Christopher Pelosi to the minors.) |
| | C | Signed (The Boston Bruins signed F John Farinacci to an entry-level contract.) |
| | LW | Became Unrestricted Free Agent (F Matt Filipe declared free agency.) |
| | C | Signed (The Boston Bruins signed F Jesper Boqvist. ) |
| | D | Signed (The Boston Bruins signed D Parker Wotherspoon.) |
| | C | Signed (The Boston Bruins signed F Jayson Megna to a two-way contract. ) |
| | C | Signed (The Boston Bruins signed F Jayson Megna to a two-way contract. ) |
| | LW | Signed (The Boston Bruins signed F Milan Lucic.) |
| | LW | Signed (The Boston Bruins signed F Luke Toporowski to a two-way contract. ) |
| | LW | Signed (The Boston Bruins signed F James van Riemsdyk.) |
| | LW | Signed (The Boston Bruins signed F Luke Toporowski to a two-way contract. ) |
| | C | Signed (The Boston Bruins signed F Anthony Richard to a two-way contract. ) |
| | C | Signed (The Boston Bruins signed F Patrick Brown.) |
| | C | Signed (The Boston Bruins signed F Morgan Geekie.) |
| | D | Signed (The Boston Bruins signed D Ethan Ritchie.) |
| | LW | Signed (The Boston Bruins signed F Danton Heinen.) |
| | RW | Signed (The Boston Bruins signed F Alex Chiasson.) |
| | D | Signed (The Boston Bruins signed D Kevin Shattenkirk. ) |
| | LW | Became Unrestricted Free Agent (F Tyler Bertuzzi elected free agency.) |
| | C | Became Unrestricted Free Agent (F David Krejci elected free agency.) |
| | D | Became Unrestricted Free Agent (D Connor Clifton elected free agency.) |
| | D | Became Unrestricted Free Agent (D Dmitry Orlov elected free agency.) |
| | C | Became Unrestricted Free Agent (F Patrice Bergeron elected free agency.) |
| | LW | Became Unrestricted Free Agent (F Tomas Nosek elected free agency.) |
| | RW | Became Unrestricted Free Agent (F Garnet Hathaway elected free agency.) |
| | RW | Drafted (The Boston Bruins drafted F Casper Nassen.) |
| | C | Drafted (The Boston Bruins drafted C Christopher Pelosi.) |
| | C | Drafted (The Boston Bruins drafted F Ryan Walsh.) |
| | C | Drafted (The Boston Bruins drafted F Beckett Hendrickson.) |
| | D | Drafted (The Boston Bruins drafted D Kristian Kostadinski.) |
| | C | Traded (The Boston Bruins traded F Shane Bowers to the New Jersey Devils.) To |
| | LW | Traded (The Boston Bruins traded F Taylor Hall to the Chicago Blackhawks.) To |
| | D | Traded (The Chicago Blackhawks traded D Alec Regula to the Boston Bruins. ) |
| | LW | Traded (The Boston Bruins traded F Nick Foligno to the Chicago Blackhawks. ) To |
| | D | Traded (The Chicago Blackhawks traded D Ian Mitchell to the Boston Bruins. ) From |
| | D | Traded (The New Jersey Devils traded D Reilly Walsh to the Boston Bruins.) From |