GOODYEAR, Ariz. -- Patrick Corbin was nine pitches and seven days away from completing his final tuneup.
Arizona's scheduled Opening Day starter was scheduled to throw 100 pitches, but felt tightness in his left forearm on the 91st pitch in the Diamondbacks' 4-2 victory over Cleveland on Saturday.
Corbin left with a 2-2 count on Cleveland's David Adams with one out in the seventh and immediately rode back to Arizona's training facility at Salt River.
"He called us out with some stiffness in his forearm so obviously we took him out," manager Kirk Gibson said. "We have no answers for you. We'll have the doctors look at him. He felt some stiffness just below the elbow. We certainly hope it has nothing to do with the elbow."
Corbin struck out seven and walked none in 6 1/3 innings, his final outing before starting the season opener next Saturday in Australia against Los Angeles Dodgers ace Clayton Kershaw. The left-hander limited Cleveland to two runs -- none earned -- on 10 hits.
"We will look at it. Rest assured we'll be cautious," Gibson said. "Patrick started out slow but kind of settled down. He started pitching pretty good. It stinks what happened at the end. If you look at the pitch efficiency, he threw 24 pitches in the second inning but after that he made an adjustment. The other innings he had eight or nine pitches."
Diamondbacks catcher Miguel Montero was concerned about Corbin.
"I thought it was his ankle or groin or something because he was throwing good," Montero said. "There was nothing different. Of course, I'm concerned especially him. He was the guy to pitch the first game for us. I don't know what the situation is with him. He's our weapon."
Corbin wasn't as sharp as he normally is, especially with the breaking ball.
"His breaking ball was backing up a little bit. There were some two-strike counts where he really couldn't put them away with his breaking ball like he normally does. That (tight forearm) might be the reason why," Montero said.
Information from The Associated Press was used in this report.