January 09, 2015

Orioles  designate Ryan Lavarnway for assignment

January 27, 2015

Stephen Tarpley traded from Orioles  to Pirates 

February 20, 2015

Steven Brault traded from Orioles  to Pirates 

April 09, 2015

Ben Rowen traded from Dodgers  to Orioles 

April 18, 2015

Orioles  place Jonathan Schoop on the injured list

May 08, 2015

Orioles  place Kevin Gausman on the injured list

May 26, 2015

Orioles  designate Ryan Lavarnway for assignment

June 16, 2015

Orioles  sign Ryan Mountcastle

June 17, 2015

Orioles  sign Ryan Meisinger

June 19, 2015

Orioles  sign Cedric Mullins

June 20, 2015

Orioles  sign Garrett Cleavinger

June 26, 2015

Orioles  sign Jay Flaa

June 28, 2015

Orioles  sign DJ Stewart

June 29, 2015

Orioles  sign Nick Vespi

July 05, 2015

Orioles  sign Ryan McKenna

July 31, 2015

Tommy Hunter traded from Orioles  to Cubs 

August 01, 2015

Orioles  place Mike Wright on the injured list

August 10, 2015

Orioles  place Chaz Roe on the injured list

August 29, 2015

Orioles  sign Alexander Wells

September 24, 2015

Orioles  place Dylan Bundy on the injured list

October 23, 2015

Orioles  sign Adam Kolarek

November 02, 2015

Gerardo Parra became a free agent

Darren O'Day became a free agent

November 24, 2015

Orioles  sign Ji-Man Choi

December 14, 2015

Orioles  sign Darren O'Day as a free agent