January 16, 2013
February 04, 2013
Max Stassi
traded from
Athletics 
to
Astros
Jed Lowrie
traded from
Astros
to
Athletics
Brad Peacock
traded from
Athletics
to
Astros
March 20, 2013
Ian Krol
traded from
Athletics
to
Nationals
April 05, 2013
Stephen Vogt
traded from
Rays
to
Athletics
May 01, 2013
Athletics
place
Brett Anderson
on the injured list
May 08, 2013
Athletics
place
Josh Reddick
on the injured list
June 11, 2013
Athletics
sign
Lou Trivino
June 14, 2013
Athletics
sign
Chad Pinder
Athletics
sign
Billy McKinney
June 17, 2013
Athletics
sign
Kyle Finnegan
August 23, 2013
Kurt Suzuki
traded from
Nationals
to
Athletics
August 26, 2013
Athletics
place
Josh Reddick
on the injured list
November 01, 2013
Kurt Suzuki
became a free agent
November 25, 2013
Fernando Abad
traded from
Nationals
to
Athletics
December 03, 2013
Josh Lindblom
traded from
Rangers
to
Athletics
December 04, 2013
Athletics
sign
Scott Kazmir
as a free agent
December 10, 2013
Drew Pomeranz
traded from
Rockies
to
Athletics
Brett Anderson
traded from
Athletics
to
Rockies