"He had a thumb thing last night, where he kind of banged his thumbnail, and also has kind of a stiff back this morning," Twins manager Ron Gardenhire said. "He's available if I need him off the bench, but he's not going to play [Wednesday]."
Casilla tweaked his back while taking batting practice before Tuesday's game against the Dodgers. But he felt well enough to go 1-for-3 with a double to help the Twins to a 6-4 win.
Gardenhire, though, wanted to be cautious with Casilla, and the manager gave Matt Tolbert the start at second base on Wednesday.