Boley played in the entirety of the Giants' 27-16 win over Kansas City on Sunday but after his right knee stiffened up during the plane ride back to New York, he was sent for tests, which revealed a partially torn meniscus, and he had surgery on Tuesday morning, according to the New York Daily News.
Prior to the 2009 season, the 27-year-old signed a five-year, $25 million contract with New York. He underwent surgery in June to repair a torn labrum in his hip, then missed most of training camp while recovering.
In Sunday's game against the Chiefs, Boley was impressive, registering a sack, four tackles for losses and one pass knockdown.
Boley could return for a Nov. 8 matchup against San Diego but is more likely to return for a Nov. 22 game against Atlanta after a bye week.
The Giants D is already without safety Kenny Phillips — who is out for the season — plus defensive tackle Chris Canty and cornerback Aaron Ross.
