| | 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.) |
| | C | Sent to minors (The Boston Bruins sent F Curtis Hall to the minors.) |
| | LW | Sent to minors (The Boston Bruins sent F Luke Toporowski 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 |
| | D | Signed (The Boston Bruins signed D Mason Lohrei.) |
| | G | Sent to minors (The Boston Bruins assigned G Kyle Keyser to the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Kyle Keyser from 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 Oskar Steen to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen from the minors.) |
| | LW | Activated (The Boston Bruins activated F Nick Foligno.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi.) |
| | G | Sent to minors (The Boston Bruins reassigned G Brandon Bussi to the minors.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi.) |
| | C | Sent to minors (The Boston Bruins assigned F Oskar Steen to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Jack Ahcan 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 Vinni Lettieri to the minors.) |
| | D | Sent to minors (The Boston Bruins assigned D Connor Carrick to the minors.) |
| | D | Called up from minors (The Boston Bruins recalled D Connor Carrick.) |
| | G | Called up from minors (The Boston Bruins recalled G Brandon Bussi.) |
| | D | Called up from minors (The Boston Bruins recalled D Jack Ahcan.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen.) |
| | C | Called up from minors (The Boston Bruins recalled F Vinni Lettieri.) |
| | LW | Activated (The Boston Bruins activated F Taylor Hall from injured reserve.) |
| | C | Sent to minors (The Boston Bruins assigned F Oskar Steen to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen.) |
| | C | Sent to minors (The Boston Bruins assigned F Oskar Steen to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Oskar Steen.) |
| | LW | Suspension Over (F A.J. Greer was reinstated from suspension.) |
| | LW | Suspended (The NHL suspended Boston Bruins F A.J. Greer for one game.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko.) |
| | C | Sent to minors (The Boston Bruins assigned F Jakub Lauko to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko.) |
| | C | Sent to minors (The Boston Bruins assigned F Jakub Lauko to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko from the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko from the minors.) |
| | C | Sent to minors (The Boston Bruins sent F Jakub Lauko to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko from the minors.) |
| | C | Sent to minors (The Boston Bruins assigned F Jakub Lauko to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko.) |
| | LW | Traded (The Detroit Red Wings traded F Tyler Bertuzzi to the Boston Bruins.) From |
| | LW | Placed on Injured Reserve (The Boston Bruins placed F Nick Foligno on injured reserve.) |
| | LW | Placed on Injured Reserve (The Boston Bruins placed F Taylor Hall on injured reserve.) |