Oakland recalled Allen from Triple-A Las Vegas on Tuesday, Matt Kawahara of the San Francisco Chronicle reports.
Allen comes up to replace Aledmys Diaz after the latter was placed on the 10-day injured list. In 17 plate appearances with Oakland prior to being demoted to Triple-A, Allen hit just .063, but he performed well in his time with Las Vegas and should see plenty of reps at shortstop with Diaz on the shelf.