The Twins designated Outman for assignment Saturday, Aaron Gleeman of AaronGleeman.com reports.
Outman's playing time has been reduced significantly since late May, and he'll now officially lose his place on the active and 40-man rosters to make room for Royce Lewis, who was recalled from Triple-A on Saturday. The 29-year-old Outman has slashed just .156/.229/.250 across 70 plate appearances in the majors this season.