The Twins optioned Keirsey to Triple-A St. Paul on Saturday.
With Carlos Correa (heel) returning from the injured list, Keirsey will be squeezed back to the minors in order to clear space on Minnesota's active roster. The 27-year-old outfielder went 1-for-10 during his time in the big leagues and only figures to return this season if the Twins' outfield depth is tested during the final few weeks.