Pascal Dupuis, who will have ACL knee surgery and is likely out for the rest of the season, was a top-line fit for Penguins captain Sidney Crosby, who so preferred him that he sought to keep him as a linemate even when Jarome Iginla arrived last season. Finding wingers who fit with Crosby has proven a great challenge over the years, as his style - skilled grinder with speed and a backhand preference - does not easily fit with traditional scoring wingers. Few acquisitions by Pens GM Ray Shero have meshed instantly with Crosby, with Bill Guerin (2009) being the exception. Replacing Dupuis in this regard will provide a great challenge to Shero.