January 03, 2019
Mets 
sign
Jason Krizan
January 06, 2019
Sam Haggerty
traded from
Indians
to
Mets
Kevin Plawecki
traded from
Mets
to
Indians
J.D. Davis
traded from
Astros
to
Mets
January 10, 2019
Mets
sign
Luis Avilan
January 11, 2019
Mets
sign
Hector Santiago
January 16, 2019
Mets
sign
Jed Lowrie
as a free agent
January 28, 2019
Mets
sign
Justin Wilson
as a free agent
March 27, 2019
Mets
sign
Rene Rivera
March 28, 2019
Mets
place
Todd Frazier
on the injured list
Mets
place
Drew Smith
on the injured list
Mets
place
Travis d'Arnaud
on the injured list
Mets
place
Jed Lowrie
on the injured list
April 20, 2019
Mets
place
Jacob deGrom
on the injured list
April 22, 2019
Mets
place
Justin Wilson
on the injured list
April 28, 2019
Mets
designate
Travis d'Arnaud
for assignment
May 01, 2019
Mets
place
Jeurys Familia
on the injured list
May 03, 2019
Mets
release
Travis d'Arnaud
May 04, 2019
Mets
place
Luis Avilan
on the injured list
May 09, 2019
Mets
place
Steven Matz
on the injured list
May 11, 2019
Mets
place
Justin Wilson
on the injured list
May 17, 2019
Mets
place
Michael Conforto
on the injured list
May 20, 2019
Mets
place
Seth Lugo
on the injured list
May 22, 2019
Mets
place
Brandon Nimmo
on the injured list
Mets
designate
Paul Sewald
for assignment
May 23, 2019
Mets
place
Jeff McNeil
on the injured list
Mets
place
Robinson Cano
on the injured list
May 24, 2019
Mets
sign
Ervin Santana
June 09, 2019
Mets
place
Robinson Cano
on the injured list
June 15, 2019
Mets
designate
Hector Santiago
for assignment
Mets
sign
Brett Baty
June 16, 2019
Mets
place
Noah Syndergaard
on the injured list
June 18, 2019
Mets
place
Jeurys Familia
on the injured list
July 16, 2019
Mets
place
Zach Wheeler
on the injured list
July 27, 2019
Mets
place
Dominic Smith
on the injured list
July 28, 2019
Marcus Stroman
traded from
Blue Jays
to
Mets
Anthony Kay
traded from
Mets
to
Blue Jays
Simeon Woods Richardson
traded from
Mets
to
Blue Jays
August 05, 2019
Mets
place
Robinson Cano
on the injured list
August 08, 2019
Mets
sign
Brad Brach
as a free agent
August 09, 2019
Mets
sign
Joe Panik
as a free agent
August 14, 2019
Mets
place
Jeff McNeil
on the injured list
August 17, 2019
Mets
place
Robert Gsellman
on the injured list
August 24, 2019
Mets
place
Tomas Nido
on the injured list
September 14, 2019
Mets
designate
Eric Hanhold
for assignment
September 26, 2019
Mets
place
Jeff McNeil
on the injured list
October 31, 2019
Todd Frazier
became a free agent
Joe Panik
became a free agent
Brad Brach
became a free agent
Zach Wheeler
became a free agent
Rene Rivera
became a free agent
Luis Avilan
became a free agent
November 01, 2019
Juan Lagares
became a free agent
December 03, 2019
Mets
sign
Chasen Shreve
December 05, 2019
Jake Marisnick
traded from
Astros
to
Mets
Blake Taylor
traded from
Mets
to
Astros
Mets
sign
Max Moroff
December 06, 2019
Mets
designate
Chris Flexen
for assignment
Mets
sign
Brad Brach
as a free agent
December 11, 2019
Mets
release
Chris Flexen
December 13, 2019
Mets
designate
Chris Mazza
for assignment
Mets
sign
Michael Wacha
as a free agent
December 16, 2019
Mets
designate
Stephen Nogosek
for assignment
December 24, 2019
Mets
designate
Sam Haggerty
for assignment
Mets
sign
Dellin Betances
as a free agent