Duffey likely won't be able to pitch again until Thursday after registering a three-inning save in the second game of Monday's doubleheader against the White Sox, the Mike Berardino of the St. Paul Pioneer Press reports.
After struggling in July with a 7.36 ERA, Duffey has given up just one run in 9.1 innings with a 7.7 K/9 in August. The Twins remain a bit unsettled at the back end of the bullpen following the July 31 trade of Brandon Kintzler, but Duffey still seems to rank behind at least Matt Belisle and Trevor Hildenberger in the pecking order for saves.