Buxton had five hits, a walk and a home run in 12 at-bats during his brief return to Triple-A.
The second overall pick in the 2012 draft, Buxton is hitting just .218/.292/.311 this season, but ranks third in the majors in defensive WAR with 2.02.
Manager Paul Molitor appears to have found a pitcher to fill in for Jaime Garcia at the back end of the rotation after the recently-acquired starter was dealt at the trade deadline to the New York Yankees.
The Twins purchased the contract of veteran minor leaguer Dillon Gee from the Red Wings, adding a 31-year-old right-hander with eight seasons of major-league experience.
Minnesota had two open roster spots after trading Garcia and closer Brandon Kintzler for prospects at the trade deadline.
Gee has a 4.13 career ERA in 151 appearances, and has a 2.00 ERA with a 1.000 WHIP in five starts for the Red Wings this season
Gee spent six seasons with the New York Mets, before opting out of his contract in 2015.
He spent the 2016 season with the Kansas City Royals, before making a handful of appearances for the Texas Rangers earlier this year.