FORT MYERS, Fla. -- Twins third baseman Royce Lewis was his usual cheerful self in the clubhouse on Tuesday morning, less than 48 hours after suffering a left hamstring injury that will keep him out for a matter of weeks.

Lewis' spirits are good, he said. He’s frustrated, of course. And he appreciates the concern. But really, he has a much more immediate concern.

"I think people forget, people ask a lot about the mental state and emotional state of obviously being frustrated or whatever, but I’m thinking, ‘Anyone would be frustrated,’” Lewis said. “I think the part people forget is, ‘Dude, I’m hurt. It actually hurts.’ The physical part of, I can’t put my clothes on and going to bed is not fun. I didn’t get good sleep because it hurts. That’s what I’m dealing with at the moment.”

Lewis received an MRI exam on Monday, which the club said revealed a moderate hamstring strain. He’s already receiving a considerable amount of treatment, including time in an oxygen chamber on Tuesday morning. The Twins' medical staff is waiting for the initial swelling to subside before putting more of a timetable on Lewis’ return. All that’s known for sure is he’ll miss Opening Day, though it seems likely that it’s still a matter of weeks rather than days after that.

Quipping that he’s learned a great deal about his own anatomy due to injuries, Lewis explained that the injury is low in the hamstring. It’s near the back of the knee or top of the calf, in the area where the tendon attaches the thigh muscles to bone.

He’s still figuring out a great deal right now, from how to move around to where he’ll be when the club breaks camp in a week. Lewis does not know whether he will be in attendance for Opening Day in St. Louis on March 27.

“I have no idea yet,” he said. “That’s a good question. That’s a question that I’m trying to find out today. I’ve got to figure out what’s going on. But I would assume probably not, just because … [it] probably makes more sense, [not] getting an extra room for somebody that’s not going to play. All the little things.

“But I don’t know all those things. All I was told yesterday was that 'You’re not going to make Opening Day.' Obviously because even if it was, if it is the lightest, the best-case scenario, it’s still going to be a couple weeks and they’re not going to rush it back. And I think also too with it being colder, that doesn’t necessarily help.”