Stephen Strasburg pitched with discomfort in his forearm, the result of small bone chips in his right elbow, for a “good amount” of the 2013 season, his agent Scott Boras said yesterday at the GM Meetings. Strasburg underwent surgery Oct. 25 to describe what the Nationals described as “loose bodies” in his pitching elbow. The Nationals expect Strasburg to be prepared for spring training and to resume his throwing program one to three weeks from now. “He’s doing great,” Boras said. “He’s working out. We’re pretty excited. It was a minor procedure, but I think it’ll have a quality impact on him as far as him pitching pain-free and being the Stephen Strasburg of old.” In his fourth season, the first of which he began the season in the majors and completed the year in the rotation, Strasburg went a hard-luck 8-9 with a 3.00 ERA over 183 innings. He spent 15 days on the disabled list in early June with a lat strain, an injury unrelated to his elbow surgery. The Nationals twice skipped his start in September as he battled the pain in his forearm. Boras did not know precisely how long Strasburg pitched through pain. “He was dealing with some stress in the forearm and such from it,” Boras said. “Certainly, each performance, it was something he had to deal with for a few days after.”