In May of the 2013 season, Barton was added back on the 40 man roster when right fielder Josh Reddick was placed on the disabled list after injuring his wrist. Everyday first basemen Brandon Moss was moved over to right field. Barton took Reddick's spot on the active roster and covered everyday first base duties. Barton was than designated for assignment again when Reddick returned. He was than outrighted to Triple-A Sacramento. On August 26, Barton was added to the 40-man roster again for the same reason.