Curtiss was promoted to Triple-A Rochester on Friday.
The 24-year-old has quickly risen through the minor-league ranks over the past couple seasons, but has really been turning heads this season at Double-A Chattanooga. Through 21 games, Curtiss has a 0.72 ERA, 0.96 WHIP and 35:12 K:BB, earning him a well-deserved shot at the next tier. The Twins have the worst bullpen in the majors in terms of reliever ERA this season (5.20), so the young right-hander may get a look this season if his success continues.