The Twins recalled Acton from Triple-A St. Paul on Tuesday.
Acton yielded five runs (two earned) with a 9:3 K:BB over 6.2 innings with the Twins earlier this season, and he's logged a 2.55 ERA and 23:8 K:BB in 17.2 frames with St. Paul. The 28-year-old will give the Twins a fresh arm in middle relief.