The A’s announced that they’ve signed Daric Barton to a one-year contract, avoiding arbitration with the first baseman. Salary figures weren’t immediately available. Barton, 28, had two stints with Oakland last season and hit .269 with three homers and 16 RBI in 37 games. As has been the case in recent seasons, Barton could face an uphill battle for playing time in 2014 as the A’s have Brandon Moss and Nate Freiman at first already. Manager Bob Melvin also mentioned that switch-hitting second baseman Alberto Callaspo could get time at first. Last season, Barton worked his way into late-season playing time and made Oakland’s postseason roster.