January 03, 2017
Marlins 
sign
Javy Guerra
January 19, 2017
Luis Castillo
traded from
Marlins
to
Reds
Austin Brice
traded from
Marlins
to
Reds
May 09, 2017
Marlins
place
Miguel Rojas
on the injured list
June 23, 2017
Marlins
sign
Sean Guenther
Marlins
sign
Trevor Rogers
Marlins
sign
Joe Dunand
Marlins
sign
Brian Miller
July 20, 2017
Pablo Lopez
traded from
Mariners
to
Marlins
David Phelps
traded from
Marlins
to
Mariners
July 25, 2017
Marlins
place
JT Riddle
on the injured list
July 26, 2017
Marlins
place
Kyle Barraclough
on the injured list
July 28, 2017
Marlins
place
Nick Wittgren
on the injured list
AJ Ramos
traded from
Marlins
to
Mets
August 15, 2017
Marlins
place
Jarlin Garcia
on the injured list
August 22, 2017
Marlins
designate
Javy Guerra
for assignment
November 20, 2017
Garrett Cooper
traded from
Yankees
to
Marlins
Mike King
traded from
Marlins
to
Yankees
Caleb Smith
traded from
Yankees
to
Marlins
November 30, 2017
Marlins
sign
Bryan Holaday
December 07, 2017
Dee Strange-Gordon
traded from
Marlins
to
Mariners
Robert Dugger
traded from
Mariners
to
Marlins
Nick Neidert
traded from
Mariners
to
Marlins
December 11, 2017
Jose Devers
traded from
Yankees
to
Marlins
Giancarlo Stanton
traded from
Marlins
to
Yankees
Starlin Castro
traded from
Yankees
to
Marlins
Jorge Guzman
traded from
Yankees
to
Marlins
December 14, 2017
Sandy Alcantara
traded from
Cardinals
to
Marlins
Zac Gallen
traded from
Cardinals
to
Marlins
Marcell Ozuna
traded from
Marlins
to
Cardinals
Daniel Castano
traded from
Cardinals
to
Marlins
Magneuris Sierra
traded from
Cardinals
to
Marlins
December 15, 2017
Marlins
sign
Rafael Ortega
December 18, 2017
Marlins
sign
Javy Guerra