The Twins selected Blewett's contract from Triple-A St. Paul on Saturday, Betsy Helfand of the St. Paul Pioneer Press reports.
Blewett elected free agency after being DFA'd by the Twins on Aug. 13 but eventually re-signed with the club on a minor-league deal last Saturday. The right-hander will now return to Minnesota's bullpen to replace Steven Okert, who was DFA'd in a corresponding move.