Darvish awaits results of MRI on right triceps

Rangers' ace exited spring debut Thursday after just 12 pitches due to tightness

Darvish awaits results of MRI on right triceps

SURPRISE, Ariz. -- Rangers starter Yu Darvish had an MRI on his right triceps muscle Friday, followed by an examination by team orthopedist Dr. Keith Meister.

The results of the MRI are not expected until Saturday.

"I'd like to sit here and tell you we have no concern, but the reality is anytime a pitcher expresses any sort of discomfort in his arm, we're going to want to evaluate it fully," Rangers assistant general manager Thad Levine said. "We're going to let Dr. Meister evaluate [Darvish] and review the MRI and basically tell us how concerned we should be right now."

On Thursday, Darvish exited his first start of the Cactus League after just one inning and 12 pitches due to tightness in his triceps. The right-hander felt some tightness in the muscle while warming up in the bullpen before the start against the Royals.

"With the fact that he had an injury last year, if he's expressing any similar symptoms, we're going to play this by the book before we put him back on the mound," Levine said. "We're just not going to leave [any] stone unturned. He's too important to the team. We just want to have every single piece of information we can possibly have before we make the next decision on him."

Darvish missed the final seven weeks of the 2014 season with mild inflammation in his right elbow. On Friday, the pitcher said he was fine. Levine said Darvish is feeling "very upbeat right now."

"I think it's more the time of year right now than an overall strategy," Levine said. "We have a lot of season ahead of us. We're not going to make a capricious decision now that could possibly impact the season."

Jesse Sanchez is a national reporter for MLB.com. Follow him on Twitter @JesseSanchezMLB. This story was not subject to the approval of Major League Baseball or its clubs.