Davis elected free agency Oct. 6.
Davis was outrighted to Triple-A Indianapolis after clearing waivers Sunday, Kevin Gorman of TribLive.com reports.
Davis was designated for assignment by the Pirates on Friday.
Davis' contract was selected from Triple-A Indianapolis on Thursday.
The Pirates reassigned Davis to minor-league camp Tuesday.
The Pirates signed Davis to a minor-league contract March 11.
Davis was optioned to Triple-A Indianapolis on Tuesday, Jake Crouse of MLB.com reports.