Athletics' David MacKinnon: Sent to Triple-A

MacKinnon was optioned to Triple-A Las Vegas on Sunday, Matt Kawahara of the San Francisco Chronicle reports.

MacKinnon appeared in six games since being promoted by Oakland on Aug. 16, and he'll return to the minors after he went 0-for-13 with a walk, two runs and five strikeouts. Cristian Pache was recalled from Las Vegas in a corresponding move.