February 26, 2018

Red Sox  sign J.D. Martinez as a free agent

March 24, 2018

Deven Marrero traded from Red Sox  to Diamondbacks 

March 26, 2018

Red Sox  place Eduardo Rodriguez on the injured list

Red Sox  place Drew Pomeranz on the injured list

March 29, 2018

Red Sox  place Tyler Thornburg on the injured list

April 09, 2018

Red Sox  place Xander Bogaerts on the injured list

April 23, 2018

Roenis Elias traded from Red Sox  to Mariners 

April 27, 2018

Red Sox  place Brock Holt on the injured list

May 15, 2018

Josh Taylor traded from Diamondbacks  to Red Sox 

June 01, 2018

Red Sox  place Mookie Betts on the injured list

June 05, 2018

Red Sox  place Drew Pomeranz on the injured list

June 14, 2018

Red Sox  sign Triston Casas

Red Sox  sign Jarren Duran

June 28, 2018

Santiago Espinal traded from Red Sox  to Blue Jays 

July 08, 2018

Red Sox  place Christian Vazquez on the injured list

July 12, 2018

Red Sox  place Rafael Devers on the injured list

July 15, 2018

Red Sox  place Eduardo Rodriguez on the injured list

July 25, 2018

July 29, 2018

Red Sox  place Rafael Devers on the injured list

July 31, 2018

Red Sox  place Chris Sale on the injured list

August 17, 2018

Red Sox  place Rafael Devers on the injured list

August 18, 2018

Red Sox  place Chris Sale on the injured list

October 29, 2018

Joe Kelly became a free agent

Nathan Eovaldi became a free agent

Drew Pomeranz became a free agent

Craig Kimbrel became a free agent

November 16, 2018

Red Sox  sign Domingo Tapia

November 20, 2018

December 06, 2018

Red Sox  sign Nathan Eovaldi as a free agent

December 18, 2018

Red Sox  sign Erasmo Ramirez

December 20, 2018

Red Sox  sign Ryan Weber