Matt Harrison has biceps tendinitis

ARLINGTON, Texas -- Rangers starter Matt Harrison pitched five innings, allowing four runs on four hits. He walked three and threw 95 pitches when he headed to the clubhouse for the night.

However, Harrison suffered some biceps tendinitis (left throwing arm) in the third inning. He said he suffered from stiffness and tried to throw pitches in the area behind the dugout.

He felt OK in the fourth inning, but in the fifth, the stiffness returned, and he couldn't get any velocity on the ball. Manager Ron Washington and a trainer came out to the mound after a leadoff walk to Mitch Maier to start the fifth.

"I felt like I couldn’t get the ball over to the plate," Harrison said. "It was so stiff on me, and when they came out there I wasn’t in pain or anything. It was just stiff so they let me stay in there and finish the [inning]."

In Harrison's previous start, Saturday at Seattle, Harrison threw 127 pitches, the most by a Rangers starter this season.

Harrison said he will get treatment and medicine to combat the tendinitis and hopes he doesn't miss his next start.

Harrison is scheduled to pitch again May 12 vs. Oakland, but the day off on May 10 gives him an extra day of rest to help with his biceps problem.

"If it still bothers me a little bit I could take a few more days off," Harrison said.