O'Rourke, who was diagnosed with a flexor mass pronator strain on March 21, said everything came back fine, but he's not sure what the next course of action will be. He estimated he threw off flat ground three or four times while rehabbing in Fort Myers, Fla., but has yet to throw off a mound.

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"I went up here to see one of the docs," O'Rourke said. "I don't know what it was called, but it was very cool. It was kind of an ultrasound that showed me how my ligaments, tendons and muscles were moving. It was interesting. We did that to make sure nothing was torn. But no, we were good."

O'Rourke said it gave him peace of mind knowing that there's nothing structurally wrong with his elbow and forearm, but it's been a frustrating rehab process because of how long it's taken for the injury to heal.

"If you asked me in spring, I would've been throwing a week later," O'Rourke said. "I think it was naiveite for me because I'd never been hurt. I didn't know the timelines and the waiting game. I thought I was Wolverine, and I could heal in three seconds. So for it to take this long is a bit frustrating."

O'Rourke said he's unsure if he'll continue to rehab at Target Field or if he'll head back to the club's Spring Training complex. He wasn't even told that he was flying to Minnesota until three hours before his flight on Tuesday.

"Moving forward, we're just trying to figure out the best plan for getting me back out there," O'Rourke said. "It's great knowing that nothing is torn, but not great not knowing exactly what caused it, and what's happening with it."

Rhett Bollinger has covered the Twins for MLB.com since 2011. Read his blog, Bollinger Beat, follow him on Twitter @RhettBollinger and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.