February 12, 2018

Matt Reynolds traded from Mets  to Nationals 

February 21, 2018

Nationals  place Joe Ross on the injured list

April 11, 2018

Nationals  place Adam Eaton on the injured list

April 17, 2018

Nationals  place Brian Goodwin on the injured list

April 20, 2018

Nationals  designate A.J. Cole for assignment

April 22, 2018

Nationals  place Anthony Rendon on the injured list

April 24, 2018

A.J. Cole traded from Nationals  to Yankees 

May 12, 2018

Nationals  place Ryan Zimmerman on the injured list

June 10, 2018

Nationals  place Stephen Strasburg on the injured list

Nationals  place Brandon Kintzler on the injured list

June 13, 2018

Nationals  sign Aaron Fletcher

Nationals  sign Cody Wilson

June 18, 2018

Kelvin Gutierrez traded from Nationals  to Royals 

June 19, 2018

Nationals  place Matt Adams on the injured list

July 05, 2018

Nationals  place Erick Fedde on the injured list

July 10, 2018

Nationals  place Sean Doolittle on the injured list

July 13, 2018

Nationals  sign Evan Lee

July 22, 2018

Brian Goodwin traded from Nationals  to Royals 

July 25, 2018

Nationals  place Stephen Strasburg on the injured list

July 26, 2018

Nationals  designate Jose Marmolejos for assignment

July 31, 2018

August 07, 2018

Nationals  sign Greg Holland as a free agent

August 21, 2018

Nationals  place Tommy Milone on the injured list

October 10, 2018

Kyle Barraclough traded from Marlins  to Nationals 

October 29, 2018

Bryce Harper became a free agent

Greg Holland became a free agent

November 20, 2018

Nationals  sign Kurt Suzuki as a free agent

November 30, 2018

December 07, 2018

Nationals  sign Patrick Corbin as a free agent

December 12, 2018

December 18, 2018

Nationals  sign Matt Adams as a free agent

December 27, 2018

Nationals  sign Anibal Sanchez as a free agent