Boley will need 8-10 weeks to recover, which means he will miss a significant amount of training camp -- if not all of it.
This is a serious blow to the Giants revamped defense. Boley, signed from the Atlanta Falcons, is being counted on to be the playmaking outside linebacker the Giants did not have last season.
Missing the majority of camp won't help Boley's adjustment to being with a new team and learning a new system.
This also comes as a surprise to me. I can't recall any indication during the recent mini-camp that Boley was hurt.