Chicago Blackhawks' Niklas Hjalmarsson, left, of Sweden, and Vancouver Canucks' Mason Raymond battle to get to the puck during the first period of an NHL hockey game in Vancouver, British Columbia, on Friday, Feb. 1, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Hawks winger Michael Frolik catches up with Detroit defenseman Brendan Smith in the first period of the Chicago Blackhawks 2-1 overtime win over the Detroit Red Wings Sunday January 27, 2013 at the United Center. | Tom Cruze~Sun-Times

Chicago Blackhawks goalie Ray Emery (30) stops a shot on goal by Phoenix Coyotes' Shane Doan (19) as Brent Seabrook (7) defends during the second period of an NHL hockey game, Sunday, Jan. 20, 2013, in Glendale, Ariz. (AP Photo/Matt York)

Chicago Blackhawks center Jonathan Toews (19) and Duncan Keith (2) celebrate after Toews scored against the Nashville Predators in the second period of an NHL hockey game, Sunday, Feb. 10, 2013, in Nashville, Tenn. (AP Photo/Mark Humphrey)

Chicago Blackhawks' Niklas Hjalmarsson (4), of Sweden, skates with the puck as he tries to avoid Phoenix Coyotes' Keith Yandle (3) during an NHL hockey game Thursday, Feb. 7, 2013, in Glendale, Ariz. The Blackhawks defeated the Coyotes 6-2. (AP Photo/Ross D. Franklin)

Chicago Blackhawks goalie Corey Crawford allows a goal to Vancouver Canucks' Alexander Edler, not shown, as Chicago's Bryan Bickell (29), Duncan Keith (2), and Canucks' Henrik Sedin (33), of Sweden, and Mason Raymond (21) watch during the first period of an NHL hockey game in Vancouver, British Columbia, on Friday, Feb. 1, 2013. (AP Photo/The Canadian Press, Darryl Dyck)

Chicago Blackhawks' Corey Crawford (50) stops a shot by Dallas Stars' Ryan Garbutt (40) in the third period of an NHL hockey game as Duncan Keith (2), Dave Bolland (36) and Patrick Sharp (10) help against the pressure Thursday, Jan. 24, 2013, in Dallas. The Blackhawks won in overtime 3-2. (AP Photo/Tony Gutierrez)