The Twins designated Kowar (shoulder) for assignment Thursday, Dan Hayes of The Athletic reports.
The transaction clears a 40-man roster spot for Anthony Banda, who was acquired via trade Thursday. Kowar was a waiver claim of the Twins earlier this month and could now be on the move again. He ended last season on the injured list with a right shoulder impingement, and it's unclear what Kowar's current health status is.