Oakland was defending their division title in the new five-team American League West during the 2013 season.

Grant Green, Arnold Leon, Shane Peterson, and Michael Ynoa were added to the 40-man roster and Andrew Carignan, Brandon Hicks (who was traded to the Mets) and Jim Miller (who was claimed off waivers by the Yankees and later designated for assignment) were removed.

When free agent Stephen Drew signed with the Boston Red Sox, Oakland signed Japanese shortstop Hiroyuki Nakajima to a 2-year, $6.5 million deal, with an option for a third year, in order to fill the vacancy.

In February, the A's were involved in a five-player deal with new division rival Houston, trading Chris Carter, Brad Peacock and Max Stassi in exchange for shortstop Jed Lowrie and reliever Fernando Rodriguez.

Infielders Outfielders Coaches Note: G = Games played; AB = At bats; R = Runs; H = Hits; 2B = Doubles; 3B = Triples; HR = Home runs; RBI = Runs batted in; SB = Stolen bases; BB = Walks; AVG = Batting average; SLG = Slugging percentage Source:[1] Note: W = Wins; L = Losses; ERA = Earned run average; G = Games pitched; GS = Games started; SV = Saves; IP = Innings pitched; H = Hits allowed; R = Runs allowed; ER = Earned runs allowed; BB = Walks allowed; SO = Strikeouts Source:[2] 9:37 p.m. (EDT) at O.co Coliseum in Oakland, California 9:07 p.m. (EDT) at O.co Coliseum in Oakland, California 1:07 p.m. (EDT) at Comerica Park in Detroit, Michigan 5:07 p.m. (EDT) at Comerica Park in Detroit, Michigan 8:07 p.m. (EDT) at O.co Coliseum in Oakland, California [3]