June 03, 2014
Athletics 
place
Josh Reddick
on the injured list
June 13, 2014
Athletics
sign
John Nogowski
June 16, 2014
Athletics
sign
Matt Chapman
June 29, 2014
Athletics
place
Josh Reddick
on the injured list
July 05, 2014
Billy McKinney
traded from
Athletics
to
Cubs
July 31, 2014
Tommy Milone
traded from
Athletics
to
Twins
Jon Lester
traded from
Red Sox
to
Athletics
August 15, 2014
Athletics
place
Jed Lowrie
on the injured list
August 24, 2014
Athletics
place
Sean Doolittle
on the injured list
October 30, 2014
Jon Lester
became a free agent
Jed Lowrie
became a free agent
November 28, 2014
Athletics
designate
Josh Lindblom
for assignment
Josh Donaldson
traded from
Athletics
to
Blue Jays
Kendall Graveman
traded from
Blue Jays
to
Athletics
Sean Nolin
traded from
Blue Jays
to
Athletics
December 08, 2014
Joey Wendle
traded from
Indians
to
Athletics
December 09, 2014
Chris Bassitt
traded from
White Sox
to
Athletics
Marcus Semien
traded from
White Sox
to
Athletics
December 11, 2014
Mark Canha
traded from
Rockies
to
Athletics
December 18, 2014
Jesse Hahn
traded from
Padres
to
Athletics
R.J. Alvarez
traded from
Padres
to
Athletics