De Vries, 27, allowed six runs (three earned) on six hits over five-plus innings in his debut. Gardenhire, though, didn't say which day De Vries will make his next outing, but it's expected to be on Tuesday against the A's at Target Field.
"He did just fine," Gardenhire said. "We plan on him starting again in five days or somewhere in there."
De Vries, who is an Eden Prairie native and starred at the University of Minnesota, said he was pleased by his first outing after having a day to look back on it.
"As a first outing, especially my first big league outing, I'm happy with it," De Vries said. "Obviously, I want us to win really bad and wish I would've been able to get through that sixth inning without any more runs, but that's the game. Sometimes it happens, sometimes it doesn't."