| | 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.) |
| | C | Sent to minors (The Boston Bruins assigned F Vinni Lettieri to the minors.) |
| | LW | Activated (The Boston Bruins activated F Tomas Nosek from injured reserve.) |
| | D | Traded (The Washington Capitals traded D Dmitry Orlov to the Boston Bruins.) From |
| | RW | Traded (The Washington Capitals traded F Garnet Hathaway to the Boston Bruins.) From |
| | C | Traded (The Boston Bruins traded F Craig Smith to the Washington Capitals.) To |
| | LW | Placed on Injured Reserve (Signed) |
| | 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 | Placed on Injured Reserve (The Boston Bruins have placed F Vinni Lettieri on the injured reserve list.) |
| | C | Called up from minors (The Boston Bruins recalled F Vinni Lettieri.) |
| | C | Called up from minors (The Boston Bruins recalled F Jakub Lauko.) |
| | LW | Sent to minors (The Boston Bruins assigned F Joona Koppanen to the minors.) |
| | 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.) |
| | LW | Called up from minors (The Boston Bruins recalled F Joona Koppanen.) |
| | LW | Sent to minors (The Boston Bruins assigned F Joona Koppanen to the minors.) |
| | RW | Sent to minors (The Boston Bruins assigned F Chris Wagner to the minors.) |
| | LW | Called up from minors (The Boston Bruins recalled F Joona Koppanen.) |
| | RW | Sent to minors (The Boston Bruins assigned F Fabian Lysell to the minors.) |
| | RW | Called up from minors (The Boston Bruins recalled F Chris Wagner.) |
| | LW | Placed on Injured Reserve (The Boston Bruins placed F Jake DeBrusk on injured reserve.) |
| | C | Called up from minors (The Boston Bruins recalled F Craig Smith.) |
| | C | Sent to minors (The Boston Bruins assigned F Craig Smith to the minors.) |
| | C | Called up from minors (The Boston Bruins recalled F Craig Smith.) |
| | C | Waived (The Boston Bruins waived F Craig Smith.) |
| | RW | Called up from minors (The Boston Bruins recalled F Fabian Lysell from the minors.) |
| | RW | Called up from minors (The Boston Bruins recalled F Fabian Lysell from the minors.) |
| | D | Sent to minors (Providence-AHL) |
| | D | Waived (Signed) |
| | G | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Waived (Signed) |
| | C | Sent to minors (Providence-AHL) |
| | D | Released (Signed) |
| | D | Signed as Free Agent (Three-year, entry-level contract) |
| | G | Called up from minors (from Providence-AHL) |
| | D | Called up from minors (from Providence-AHL) |
| | C | Called up from minors (from Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Called up from minors (from Providence-AHL) |
| | C | Called up from minors (from Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Traded (w/ Michael DiPietro for Jack Studnicka) From |
| | G | Traded (w/ Jonathan Myrenberg for Jack Studnicka) From |
| | C | Traded (for DiPietro and Myrenberg) To |
| | C | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Called up from minors (from Providence-AHL) |
| | D | Signed as Free Agent (One-year contract) |
| | D | Called up from minors (from Providence-AHL) |
| | LW | Called up from minors (from Providence-AHL) |
| | C | Called up from minors (from Providence-AHL) |
| | D | Released (Signed) |
| | RW | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | LW | Sent to minors (Providence-AHL) |
| | RW | Waived (Signed) |
| | D | Waived (Signed) |
| | LW | Waived (Signed) |
| | D | Sent to minors (Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | LW | Sent to minors (Providence-AHL) |
| | G | Sent to minors (Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | RW | Sent to minors (Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | G | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Waived (Signed) |
| | C | Waived (Signed) |
| | LW | Waived (Signed) |
| | G | Waived (Signed) |
| | D | Sent to minors (Providence-AHL) |
| | C | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Sent to minors (Providence-AHL) |
| | D | Waived (Signed) |
| | C | Waived (Signed) |
| | D | Waived (Signed) |
| | C | Sent to minors (Providence-AHL) |
| | LW | Sent to minors (Providence-AHL) |
| | D | Released (Signed) |
| | G | Sent to minors (Providence-AHL) |
| | RW | Released (Signed) |
| | G | Released (Signed) |
| | D | Released (Signed) |
| | C | Sent to minors (Providence-AHL) |
| | RW | Released (Signed) |
| | LW | Released (Signed) |
| | LW | Released (Signed) |
| | LW | Released (Signed) |
| | C | Assigned to Junior Club (Guelph-OHL) |
| | D | Assigned to Junior Club (London-OHL) |
| | D | Assigned to Junior Club (Rimouski-QMJHL) |
| | LW | Sent to minors (Providence-AHL) |
| | D | Assigned to Junior Club (Sarnia-OHL) |
| | D | Invited to Training Camp (Signed) |
| | C | Assigned to Junior Club (Oshawa-OHL) |
| | G | Invited to Training Camp (Signed) |
| | D | Invited to Training Camp (Signed) |
| | D | Invited to Training Camp (Signed) |
| | RW | Invited to Training Camp (Signed) |
| | LW | Invited to Training Camp (Signed) |
| | LW | Invited to Training Camp (Signed) |
| | RW | Invited to Training Camp (Signed) |
| | LW | Invited to Training Camp (Signed) |
| | D | Retired (Signed) |
| | D | Signed as Free Agent (One-day contract) |
| | C | Re-Signed (One-year contract) |
| | C | Signed as Free Agent (One-year contract) |
| | C | Signed as Free Agent (One-year contract) |
| | C | Signed (Three-year, entry-level contract) |
| | C | Re-Signed (Two-year, two-way contract) |
| | D | Signed (Three-year, entry-level contract) |
| | LW | Re-Signed (One-year, two-way contract) |
| | D | Re-Signed (One-year, two-way contract) |
| | LW | Traded (for Pavel Zacha) To |
| | D | Became Unrestricted Free Agent (Signed) |
| | D | Became Unrestricted Free Agent (Signed) |
| | C | Traded (for Erik Haula) From |
| | LW | Signed as Free Agent (Two-year, two-way contract) |
| | D | Became Unrestricted Free Agent (Signed) |
| | LW | Became Unrestricted Free Agent (Signed) |
| | C | Became Unrestricted Free Agent (Signed) |
| | D | Signed as Free Agent (One-year, two-way contract) |
| | C | Signed as Free Agent (One-year, two-way contract) |
| | D | Became Unrestricted Free Agent (Signed) |
| | D | Signed as Free Agent (Two-year, two-way contract) |
| | C | Became Unrestricted Free Agent (Signed) |
| | G | Became Unrestricted Free Agent (Signed) |
| | G | Signed as Free Agent (One-year, two-way contract) |
| | G | Became Unrestricted Free Agent (Signed) |
| | RW | Became Unrestricted Free Agent (Signed) |
| | C | Became Unrestricted Free Agent (Signed) |
| | C | Became Unrestricted Free Agent (Signed) |
| | D | Contract extended (One-year, two-way contract extension) |
| | G | Contract extended (One-year, two-way contract extension) |
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