Chicago Blackhawks' Nick Leddy, left, checks Calgary Flames' Akim Aliu into the boards during the first period of an NHL hockey game on Friday, April 26, 2013, in Chicago. (AP Photo/Brian Kersey)
Calgary Flames goalie Joey MacDonald, right, swats the puck away as Chicago Blackhawks' Patrick Sharp, center, tries to score and Flames' Mark Giordano defends during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
Chicago Blackhawks' Patrick Kane, bottom and Calgary Flames' Chris Butler exchange words after Kane flew into the net while trying to score during the second period of an NHL hockey game on Friday, April 26, 2013, in Chicago. The Blackhawks won 3-1. (AP Photo/Brian Kersey)
St. Louis Blues goaltender Brian Elliott faces Calgary Flames center Roman Horak on a short-handed breakaway in third period of an NHL hockey game on Thursday, April 25, 2013, in St. Louis. (AP Photo/St. Louis Post-Dispatch, Chris Lee)
Chicago Blackhawks' Patrick Kane, right, passes the puck as Calgary Flames' Mark Giordano defends during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
Chicago Blackhawks' Johnny Oduya, left, of Sweden, checks Calgary Flames' Blair Jones during the first period of an NHL hockey game, Friday, April 26, 2013, in Chicago. (AP Photo/Brian Kersey)
Chicago Blackhawks' Brandon Saad, center, moves the puck as Calgary Flames' Dennis Wideman, left, and Matt Stajan defend during the third period of an NHL hockey game, Friday, April 26, 2013 in Chicago. The Blackhawks won 3-1. (AP Photo/Brian Kersey)
St. Louis Blues right wing Ryan Reaves, second from right, is congratulated by teammates after scoring his second goal of their NHL hockey game in third period against the Calgary Flames on Thursday, April 25, 2013, at the Scottrade Center in St. Louis. (AP Photo/St. Louis Post-Dispatch, Chris Lee)
Chicago Blackhawks' Marcus Kruger of Sweden, front, controls the puck as Calgary Flames' Brian McGrattan defends during the third period of an NHL hockey game, Friday, April 26, 2013 in Chicago. The Blackhawks won 3-1. (AP Photo/Brian Kersey)
Chicago Blackhawks' Jonathan Toews, left, celebrates with his teammates after scoring a goal during the first period of an NHL hockey game against the Calgary Flames, Friday, April 26, 2013, in Chicago. (AP Photo/Brian Kersey)
Calgary Flames' Lee Stempniak (22) trips over Chicago Blackhawks' Johnny Oduya, left of Sweden, as Flames' Mike Cammalleri (13) and Blackhawks' Michal Rozsival, right, of the Czech Republic, look for the puck during the third period of an NHL hockey game, Friday, April 26, 2013, in Chicago. The Blackhawks won 3-1. (AP Photo/Brian Kersey)
Chicago Blackhawks' Jonathan Toews, right, passes the puck as Calgary Flames' Dennis Wideman defends during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
Chicago Blackhawks' Michal Rozsival, left, of the Czech Republic, Brandon Bollig (52) and goalie Corey Crawford defend the net as Calgary Flames' Ben Street, center, tries to score during the first period of an NHL hockey game on Friday, April 26, 2013, in Chicago. (AP Photo/Brian Kersey)
Chicago Blackhawks' Marian Hossa of Slovokia, left, tries to score on Calgary Flames goalie Joey MacDonald during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
Calgary Flames' Mark Giordano, right, tackles Chicago Blackhawks' Viktor Stalberg of Sweden during the third period of an NHL hockey game, Friday, April 26, 2013 in Chicago. The Blackhawks won 3-1. (AP Photo/Brian Kersey)
Chicago Blackhawks' Viktor Stalberg of Sweden, left, tries to score on Calgary Flames goalie Joey MacDonald during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
Calgary Flames' Cory Sarich (6) checks Chicago Blackhawks' Patrick Sharp during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
St. Louis Blues goaltender Brian Elliott covers up the puck against the Calgary Flames in the third period of an NHL hockey game on Thursday, April 25, 2013, in St. Louis. (AP Photo/St. Louis Post-Dispatch, Chris Lee)
Chicago Blackhawks' Marian Hossa of Slovokia, center, grabs the pucks as Calgary Flames' Chris Butler, left, and goalie Joey MacDonald defend the net during the second period of an NHL hockey game, Friday, April 26, 2013 in Chicago. (AP Photo/Brian Kersey)
