Minnesota announced a 5-4 victory against Seattle on Monday that Casilla, who pinch-ran against the Mariners, is heading to the DL with a bone spur in his right elbow. The Twins are recalling Matt Tolbert from Triple-A Rochester.
Tolbert appeared in three games with the Twins earlier this season. He was optioned to Rochester on May 18.
He is hitting .256 in 39 games at Triple-A.
Manager Ron Gardenhire hinted the switch-hitting Tolbert might start on Tuesday against Seattle left-hander Jason Vargas.