Lefthander Hector Santiago was scratched from his rehab start at Rochester and is back in the Twin Cities. The Twins have pulled him off his minor league rehabilitation stint.

“He’s not feeling quite right yet,” Molitor said. “We’re still trying to do things that maybe get to the bottom of why that is.”

The Twins were waiting for the results of a test Santiago underwent over the weekend at Rochester.

Santiago last pitched for the Twins on July 2 and has made two trips to the disabled list since then, most recently because of upper thoracic back pain. He could help the staff either as a starter or a reliever, but this most recent setback makes it unclear when he will be able to return to the staff.

The Twins' currently don't have a fifth starter in their rotation. The next time that spot comes up in Saturday against Arizona. Plus, the Twins play a five-game series in Chicago next week that includes a doubleheader on Monday.