Boston Bruins: What does this Alex Petrovic experiment mean?

The Boston Bruins have confirmed recent rumors of signing a defenseman to the professional tryout. Will Alex Petrovic have a shot at making the roster in late September?

The Boston Bruins have signed defenseman Alex Petrovic to a professional tryout agreement on Sunday, as officially reported by the CapFriendly. What does it mean bringing Alex Petrovic to training camp in September? His signing makes a ton of sense.

Firstly, Boston Bruins fans will probably freak out about Petrovic or any other defenseman coming on a PTO, thinking that it means that either Charlie McAvoy or Brandon Carlo are gone or not signed until December. Secondly, other Bruins fans might speculate about Torey Krug being…