Stauffer (strained intercostal) gave up two runs and four hits and two walks in 1.1 innings in Sunday's outing for Triple-A Rochester. He was supposed to go three innings and the next step in his rehab is in doubt, the Minneapolis Star Tribune reports. The Twins had indicated if he was able to throw three innings they may activate him from the DL, but it sounds like he'll need another outing or more at Triple-A.