January 05, 2021

Mets  sign Brandon Drury as a free agent

January 07, 2021

Francisco Lindor traded from None  to Mets 

January 19, 2021

Joey Lucchesi traded from Padres  to Mets 

January 27, 2021

January 30, 2021

Mets  sign Aaron Loup as a free agent

February 01, 2021

Mets  designate Robel Garcia for assignment

Jordan Yamamoto traded from Marlins  to Mets 

February 10, 2021

Mets  designate Corey Oswalt for assignment

Mets  designate Ali Sanchez for assignment

Mets  sign Albert Almora as a free agent

February 11, 2021

Mets  designate Brad Brach for assignment

Mets  sign Jonathan Villar as a free agent

February 12, 2021

Ali Sanchez traded from Mets  to Cardinals 

February 14, 2021

Mets  sign Tommy Hunter

February 16, 2021

Mets  release Brad Brach

February 20, 2021

Mets  place Noah Syndergaard on the injured list

Mets  sign Taijuan Walker as a free agent

February 21, 2021

Mets  designate Guillermo Heredia for assignment

Mets  sign Kevin Pillar as a free agent

March 30, 2021

Mets  sign Tommy Hunter as a free agent

April 01, 2021

Mets  place Carlos Carrasco on the injured list

Mets  place Seth Lugo on the injured list

Mets  place Drew Smith on the injured list

April 08, 2021

Mets  place Dellin Betances on the injured list

April 10, 2021

Mets  place J.D. Davis on the injured list

April 15, 2021

Mets  sign Mason Williams

April 24, 2021

Mets  place Dellin Betances on the injured list

April 30, 2021

Mets  place Luis Guillorme on the injured list

May 03, 2021

Mets  place J.D. Davis on the injured list

May 05, 2021

Mets  place Brandon Nimmo on the injured list

May 06, 2021

Mets  place Carlos Carrasco on the injured list

May 11, 2021

Mets  place Jacob deGrom on the injured list

May 12, 2021

Mets  place Albert Almora on the injured list

May 15, 2021

Mets  designate Trevor Hildenberger for assignment

May 17, 2021

Mets  place Seth Lugo on the injured list

Mets  place Jeff McNeil on the injured list

Mets  place Michael Conforto on the injured list

May 18, 2021

Mets  place Kevin Pillar on the injured list

Cameron Maybin traded from Cubs  to Mets 

Mets  sign Akeem Bostick

May 19, 2021

Mets  place Taijuan Walker on the injured list

May 21, 2021

Mets  place Pete Alonso on the injured list

Mets  place Tommy Hunter on the injured list

Mets  designate Daniel Zamora for assignment

May 22, 2021

Mets  designate Jake Hager for assignment

May 25, 2021

Mets  place Jordan Yamamoto on the injured list

May 26, 2021

Mets  place Johneshwy Fargas on the injured list

Mets  place Jordan Yamamoto on the injured list

Billy McKinney traded from Brewers  to Mets 

May 31, 2021

Mets  designate Cameron Maybin for assignment

June 01, 2021

Mets  designate Wilfredo Tovar for assignment

June 11, 2021

Mets  place Tommy Hunter on the injured list

June 14, 2021

Mets  designate Jacob Barnes for assignment

June 19, 2021

Mets  place Joey Lucchesi on the injured list

Jacob Barnes traded from Mets  to Blue Jays 

June 20, 2021

Mets  designate Mason Williams for assignment

June 21, 2021

Mets  place Jeurys Familia on the injured list

Mets  place Robert Gsellman on the injured list

June 23, 2021

Mets  place Tomas Nido on the injured list

Mets  place Joey Lucchesi on the injured list

Mets  place Robert Gsellman on the injured list

June 25, 2021

Mets  place Jonathan Villar on the injured list

Mets  place J.D. Davis on the injured list

Mets  sign Mason Williams

June 29, 2021

Mets  designate Jerad Eickhoff for assignment

July 02, 2021

Mets  place David Peterson on the injured list

Anthony Banda traded from Giants  to Mets 

July 04, 2021

Mets  place Sean Reid-Foley on the injured list

July 06, 2021

Mets  place Corey Oswalt on the injured list

July 11, 2021

Mets  designate Stephen Tarpley for assignment

July 16, 2021

Mets  designate Billy McKinney for assignment

Mets  release Stephen Tarpley

July 17, 2021

Mets  place Francisco Lindor on the injured list

July 18, 2021

Mets  place Jacob deGrom on the injured list

July 19, 2021

Mets  place Corey Oswalt on the injured list

Mets  designate Johneshwy Fargas for assignment

July 20, 2021

Mets  place Jose Peraza on the injured list

Mets  designate Jerad Eickhoff for assignment

July 21, 2021

Mets  place Robert Stock on the injured list

Billy McKinney traded from Mets  to Dodgers 

July 23, 2021

Mets  place Robert Stock on the injured list

July 24, 2021

Mets  place Stephen Nogosek on the injured list

Mets  place David Peterson on the injured list

Mark Payton traded from Reds  to Mets 

Jerad Eickhoff became a free agent

July 25, 2021

Mets  sign Jerad Eickhoff

July 27, 2021

Mets  designate Roel Ramirez for assignment

July 28, 2021

Mets  designate Jerad Eickhoff for assignment

July 30, 2021

Mets  place Sean Reid-Foley on the injured list

Mets  designate Nick Tropeano for assignment

Mets  designate Akeem Bostick for assignment

July 31, 2021

Mets  designate Anthony Banda for assignment

August 01, 2021

Mets  place Luis Guillorme on the injured list

August 02, 2021

Mets  place Miguel Castro on the injured list

August 07, 2021

Mets  sign Zack Godley

August 13, 2021

Mets  place Javier Baez on the injured list

Mets  sign Josh Reddick

August 14, 2021

Mets  place Drew Smith on the injured list

August 16, 2021

Mets  place Tomas Nido on the injured list

August 20, 2021

Mets  place James McCann on the injured list

Mets  place Jake Reed on the injured list

Mets  place Jacob deGrom on the injured list

August 28, 2021

Mets  place Tomas Nido on the injured list

August 31, 2021

Mets  place Tomas Nido on the injured list

September 02, 2021

Mets  designate Geoff Hartlieb for assignment

September 04, 2021

Mets  place Brandon Nimmo on the injured list

September 17, 2021

Mets  place Thomas Szapucki on the injured list

September 26, 2021

Mets  place J.D. Davis on the injured list

Mets  designate Albert Almora for assignment

September 28, 2021

Mets  designate Chance Sisco for assignment

September 29, 2021

Mets  place Tomas Nido on the injured list

October 02, 2021

Mets  designate Brandon Drury for assignment

October 29, 2021

Jose Peraza became a free agent

November 03, 2021

Michael Conforto became a free agent

Rich Hill became a free agent

Aaron Loup became a free agent

Marcus Stroman became a free agent

Dellin Betances became a free agent

Brad Hand became a free agent

Javier Baez became a free agent

Noah Syndergaard became a free agent

Jonathan Villar became a free agent

Heath Hembree became a free agent

Jeurys Familia became a free agent

November 05, 2021

Kevin Pillar became a free agent

November 24, 2021

Mets  sign Nick Plummer as a free agent

November 28, 2021

Mets  sign Nate Fisher

November 29, 2021

Mets  sign Rob Zastryzny

November 30, 2021

Mets  designate Mark Payton for assignment

Robert Gsellman became a free agent

Mark Payton became a free agent

Stephen Nogosek became a free agent

Mets  sign Mark Canha as a free agent

Mets  sign Starling Marte as a free agent

December 01, 2021

Mets  sign Stephen Nogosek

Mets  sign Eduardo Escobar as a free agent

Mets  sign Max Scherzer as a free agent

Mets  sign Matt Reynolds