 Spencer Arrigetti goes for the Astros. The rookie righty is 4-7 with an ERA over 6. He was roughed up by Toronto Tuesday night. This is going to be his first time facing Minnesota. Now before the game, a roster move. Matt Wallner, who had a rough first two weeks of the season with the Twins before being sent down to St. Paul, he's back. He replaces Austin Martin, who was placed on the 10-day injured list with a right oblique strain, suffered in his at-bat in the ninth inning on Friday night.