Kaiser signed a minor-league contract with the Diamondbacks on Friday and received an invitation to spring training.
The Rockies reassigned Kaiser to minor-league camp Sunday.
Colorado outrighted Kaiser to Triple-A Albuquerque on Tuesday, Thomas Harding of MLB.com reports.
Kaiser was designated for assignment by the Rockies on Sunday.
Kaiser was optioned to Triple-A Albuquerque on Thursday.
The Rockies selected Kaiser's contract from Triple-A Albuquerque on Monday. He'll start at shortstop and bat ninth in the Rockies' series opener in Cincinnati.