There are a few new faces poised to crack the Montreal Canadiens roster this year, one of which is Zack Kassian, acquired from the Vancouver Canucks during the off-season.
Kassian, 24, is entering his fifth (third full) NHL season, playing already for his third NHL team. So far his career has been somewhat plagued by a lack of consistency as well as injuries. However, he appears to have proven over the last few seasons that he can definitely contribute offensively at the NHL level.
Because he was acquired (alongside the requisite fifth-round pick) for Brandon Prust, it is tempting to look at him as the latter's replacement.