Vargas is expected to be optioned to Triple-A Rochester on Saturday, Rhett Bollinger of MLB.com reports.
While the team hasn't yet made an official announcement, Vargas' name is not included on Saturday's lineup card and Triple-A left-hander Adalberto Mejia has joined the team in Kansas City. Vargas has appeared in 25 games for the Twins on the season, putting up a .259/.379/.576 slash line across 85 at-bats.