Astros second baseman Jose Altuve underwent right knee surgery on Friday, Houston general manager Jeff Luhnow announced Saturday.
The Astros expect Altuve to make a full recovery and be ready to return by spring training. The six-time All-Star originally suffered a right knee injury against the Rockies on July 25. He subsequently missed 21 games due to the ailment, which Houston described as "right knee discomfort."
Altuve reaggravated the injury during Games 2 and 3 of the ALCS against the Red Sox. Altuve served as a designated hitter in Games 3-5 of the series, which Houston lost 4-1.