Wandy Rodriguez threw his first bullpen session Friday without feeling any pain in his left forearm, where an injury to the flexor tendon forced him to miss the final four months of the 2013 season.

“I have good news for you guys,” Rodriguez told reporters after the session. “I threw my bullpen and I feel nothing.”

Rodriguez, 35, left his June 5 start in the first inning and did not pitch again in the major leagues last season. He began a rehabilitation assignment in late June, but tightness in the forearm forced him to stop. He received a platelet-rich plasma injection July 1 and rested.

He resumed throwing off a mound in August, but went to see orthopedic surgeon Dr. James Andrews for a second opinion. Andrews confirmed that there was inflammation, and Rodriguez started throwing again, but the Pirates shut him down for good in mid-September.

Doctors told Rodriguez to rest the forearm over the winter. When he started his weightlifting regimen, his forearm felt strong, so he continued. He threw over the winter in the Dominican Republic, but this was his first bullpen session of the year.

“I was a little bit nervous because I wanted to know exactly how I feel,” he said. “Every time I throw, I feel more comfortable.”

Rodriguez threw 28 pitches, including fastballs, changeups and curveballs, and also threw curveballs while playing catch.