Jul 21, 2010 4:10 PM EST

The Twins are moving struggling right-hander Nick Blackburn to the bullpen temporarily.

Left-hander Brian Duensing will take his place in the rotation.

Acting manager Scott Ullger insisted the move is temporary and made to give Blackburn a mental break. Duensing will start Friday at Baltimore.

Twins manager Ron Gardenhire was not at the ballpark, tending to a family matter.

"It's not a permanent thing. It's just to give Blackie a chance to take a step back, take a deep breath and regroup a little bit," Ullger said.

Via ESPN