January 26, 2017

Cubs  sign Brett Anderson as a free agent

February 01, 2017

Cubs  designate Dylan Floro for assignment

February 08, 2017

Alec Mills traded from Royals  to Cubs 

May 07, 2017

Cubs  place Brett Anderson on the injured list

May 08, 2017

Cubs  place Jason Heyward on the injured list

June 07, 2017

Cubs  sign Ross Detwiler

June 08, 2017

Cubs  place Kyle Hendricks on the injured list

June 22, 2017

Cubs  place Jason Heyward on the injured list

Cubs  designate Zac Rosscup for assignment

Cubs  sign Erich Uelmen

Cubs  sign Keegan Thompson

Cubs  sign Brendon Little

Cubs  sign Cory Abbott

June 26, 2017

Zac Rosscup traded from Cubs  to Rockies 

July 07, 2017

Cubs  sign Alex Lange

Cubs  sign Brandon Hughes

Cubs  sign Jeremiah Estrada

Cubs  sign Jared Young

Cubs  sign Nelson Velazquez

July 13, 2017

July 26, 2017

Cubs  designate Brett Anderson for assignment

July 31, 2017

Cubs  designate Dylan Floro for assignment

Cubs  release Brett Anderson

August 06, 2017

Cubs  sign Mike Freeman

August 11, 2017

Cubs  place Willson Contreras on the injured list

August 18, 2017

Cubs  place Justin Grimm on the injured list

Cubs  place Jon Lester on the injured list

August 19, 2017

Cubs  designate Aaron Brooks for assignment

September 01, 2017

Cubs  designate Seth Frankoff for assignment

September 13, 2017

Cubs  designate Pierce Johnson for assignment

October 04, 2017

Cubs  designate Felix Pena for assignment

October 09, 2017

Felix Pena traded from Cubs  to Angels 

October 26, 2017

Cubs  designate Mike Freeman for assignment

November 02, 2017

Alex Avila became a free agent

Jon Jay became a free agent

Wade Davis became a free agent

Jake Arrieta became a free agent

Rene Rivera became a free agent

November 20, 2017

Cubs  sign Mike Freeman

December 01, 2017

Taylor Davis became a free agent

December 07, 2017

Cubs  sign Tyler Chatwood as a free agent

December 11, 2017

Cubs  sign Alberto Baldonado

December 12, 2017

Cubs  sign Drew Smyly as a free agent

December 16, 2017

Cubs  sign Steve Cishek as a free agent

Cubs  sign Taylor Davis

December 23, 2017

Cubs  sign Anthony Bass