The Twins placed Stewart on the 15-day injured list Wednesday with a right shoulder strain, Betsy Helfand of the St. Paul Pioneer Press reports.
Stewart just returned a week ago from a lengthy absence due to shoulder issues and is now headed back to the IL. The righty was roughed up for seven runs over 2.1 innings covering three appearances over the last week while showing diminished velocity. Stewart has often been a lockdown reliever for the Twins when healthy, but whether he'll be able to regain that form this season is a fair question.