Houston Astros right-hander Zack Greinke has no structural damage in his pitching arm, manager Dusty Baker said prior to Wednesday’s Game 3 of the American League Division Series.Greinke initially was scheduled to start Wednesday’s game against the Oakland Athletics before being scratched on Tuesday. The six-time All-Star tested the arm following Tuesday’s game in Los Angeles before having a lengthy conversation with pitching coach Brent Strom.The Astros lead the best-of-five series 2-0 and Baker didn’t rule out the possibility that Greinke could be available Thursday if the series isn’t over. But Baker clearly would prefer not pushing the issue with Greinke’s sore arm.”I’m hoping that we win today’s game and then we’ll have a few days off to rehab and try to feel better before the next one,” Baker said. “We’ve got to win this game first.”Greinke, who turns 37 on Oct. 21, struggled late in the regular season and then was pulled after four innings of his first-round start against the Minnesota Twins.Greinke had a 1.84 ERA after pitching eight shutout innings against the Colorado Rockies on Aug. 18. He didn’t last more than six innings in his final seven regular-season starts and posted a 5.73 ERA during the span to raise his season ERA to 4.03.