If the Blackhawks are going to keep their NHL record season-opening point streak alive, they're going to have to do it without star winger Patrick Sharp. Sharp, who left Wednesday's game at the United Center after being sandwiched along the boards by Colorado's Ryan O'Byrne, suffered a severe shoulder separation, according to a report by Canada's TSN. He'll miss at least three weeks and up to a month. Sharp has five goals and 13 assists in 24 games, tied with Marian Hossa for third on the team in points. The Hawks recalled forward Brandon Bollig from Rockford on Thursday. Bollig had just been sent down on Wednesday to make room for defenseman Steve Montador. The rest of the injury news was positive for the Hawks. Marian Hossa, a late scratch on Wednesday, was on the team charter to Denver for Friday's rematch against the Avalanche, as was Andrew Shaw, who was elbowed in the head by Paul Stastny in the second period Wednesday and didn't return. Michael Frolik, who's missed two games with an illness, will join the team in Denver separately, likely a precautionary measure to prevent his teammates from getting sick.