Brian Duensing has an intercostal strain, so the Twins have placed him on the disabled list and called up Caleb Thielbar from Triple-A to take his spot as a left-handed reliever.
Thielbar spent most of the past two seasons in Minnesota’s bullpen and pitched well with a 2.59 ERA and 74/30 K/BB ratio in 94 innings, but the Twins still demoted him to Triple-A at the end of spring training and went with Duensing and Aaron Thompson as their lefty setup men.
Duensing had an ugly outing Thursday in which he turned a blowout into a save situation for closer Glen Perkins and he heads to the DL with a 7.36 ERA in six appearances.