January 06, 2020

Giants  sign Tyler Heineman

Giants  sign Rico Garcia

Giants  sign Chadwick Tromp

Giants  sign Sam Moll

January 16, 2020

Giants  sign Drew Smyly as a free agent

January 18, 2020

Giants  sign Rob Brantly

January 21, 2020

Giants  designate Jake Jewell for assignment

January 31, 2020

Giants  sign Pablo Sandoval

Giants  sign Carlos Sanchez

Giants  sign Darin Ruf

February 09, 2020

Giants  sign Nick Vincent

Giants  sign Billy Hamilton as a free agent

February 10, 2020

Giants  designate Burch Smith for assignment

February 12, 2020

Giants  place Reyes Moronta on the injured list

Giants  sign Wilmer Flores as a free agent

February 15, 2020

Burch Smith traded from Giants  to Athletics 

February 26, 2020

Giants  sign Trevor Cahill

March 10, 2020

Giants  place Aramis Garcia on the injured list

June 28, 2020

Giants  place Tyler Beede on the injured list

July 08, 2020

Giants  place Jarlin Garcia on the injured list

July 23, 2020

Giants  place Brandon Belt on the injured list

Giants  place Evan Longoria on the injured list

Giants  designate Kean Wong for assignment

Giants  designate Jose Siri for assignment

July 28, 2020

Giants  designate Rob Brantly for assignment

July 30, 2020

Giants  designate Dany Jimenez for assignment

July 31, 2020

Giants  place Sam Coonrod on the injured list

August 02, 2020

Giants  place Drew Smyly on the injured list

Giants  designate Jandel Gustave for assignment

Billy Hamilton traded from Giants  to Mets 

August 21, 2020

Giants  release Carlos Sanchez

August 22, 2020

Giants  place Austin Slater on the injured list

August 23, 2020

Daniel Robertson traded from Rays  to Giants 

August 26, 2020

Giants  designate Dereck Rodriguez for assignment

Rob Brantly traded from Giants  to Yankees 

August 31, 2020

Anthony Banda traded from Rays  to Giants 

September 10, 2020

Giants  release Pablo Sandoval

September 13, 2020

Giants  place Trevor Gott on the injured list

September 22, 2020

Giants  place Chadwick Tromp on the injured list

September 26, 2020

Giants  place Sam Coonrod on the injured list

October 28, 2020

Drew Smyly became a free agent

Kevin Gausman became a free agent

Trevor Cahill became a free agent

Tony Watson became a free agent

November 10, 2020

Giants  sign Jason Vosler as a free agent

November 11, 2020

Giants  sign Kevin Gausman as a free agent

November 17, 2020

Giants  sign Jason Krizan as a free agent

Giants  sign Sammy Long as a free agent

November 20, 2020

Giants  designate Aramis Garcia for assignment

December 02, 2020

Rico Garcia became a free agent

Daniel Robertson became a free agent

Chadwick Tromp became a free agent

Tyler Anderson became a free agent

December 03, 2020

Giants  sign Rico Garcia

December 08, 2020

Giants  sign Matt Wisler as a free agent

December 09, 2020

Giants  sign Chadwick Tromp as a free agent

Giants  sign Dominic Leone as a free agent

Giants  sign Silvino Bracho

Giants  sign Yunior Marte as a free agent

December 16, 2020

Giants  sign Anthony DeSclafani as a free agent

December 21, 2020

Giants  sign John Brebbia as a free agent