Twins general manager Terry Ryan said he won't have an update until Thorpe undergoes the MRI exam, but he remains hopeful the 19-year-old won't need Tommy John surgery.
"We have not gotten any full information if he'll have to have anything done to that yet," Ryan said. "It's unfortunate. I hate those things, especially for young kids. So we'll see exactly what they tell us and how we'll move forward with him."
Thorpe, a native of Australia, posted a 3.52 ERA with 80 strikeouts and 36 walks in 71 2/3 innings with Cedar Rapids last year.
Rhett Bollinger is a reporter for MLB.com. Read his blog, Bollinger Beat, and follow him on Twitter @RhettBollinger. This story was not subject to the approval of Major League Baseball or its clubs.