St. Louis Blues' Vladimir Tarasenko (91), of Russia, celebrates with teammate Alexander Steen (20) after his game-tying goal against the Chicago Blackhawks during the third period in Game 2 of a first-round NHL hockey playoff series, Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
St. Louis Blues' David Backes (42) is helped off the ice by a Blues trainer against the Chicago Blackhawks during the third period in Game 2 of a first-round NHL hockey playoff series, Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
Dallas Stars goalie Kari Lehtonen, of Finland, looks at the puck after Anaheim Ducks' Andrew Cogliano scored against him during the third period in Game 2 of the first-round NHL hockey Stanley Cup playoff series on Friday, April 18, 2014, in Anaheim, Calif. The Ducks won 3-2. (AP Photo/Jae C. Hong)
Dallas Stars' Ryan Garbutt skates on the ice before the start of Game 1 of the first-round NHL hockey Stanley Cup playoff series against the Anaheim Ducks on Wednesday, April 16, 2014, in Anaheim, Calif. (AP Photo/Jae C. Hong)
St. Louis Blues' Jay Bouwmeester, left, and Chicago Blackhawks' Jonathan Toews, right, battle for the puck during the first period in Game 2 of a first-round NHL hockey playoff series on Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
Chicago Blackhawks' Marian Hossa (81), of Sweden, and St. Louis Blues' Jay Bouwmeester (19) reach for a loose puck during the first period in Game 2 of a first-round NHL hockey playoff series on Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
St. Louis Blues' Alexander Steen warms up prior to Game 2 of a first-round NHL hockey Stanley Cup playoff series against the Chicago Blackhawks, Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
St. Louis Blues' Alex Pietrangelo (27) and Chicago Blackhawks' Jonathan Toews (19) battle for the puck during the first period in Game 2 of a first-round NHL hockey playoff series, Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
St. Louis Blues' T.J. Oshie (74) and Chicago Blackhawks' Patrick Sharp (10) reach for the puck during the second period in Game 2 of a first-round NHL hockey playoff series on Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
Chicago Blackhawks' goalie Corey Crawford, right, makes a glove-save against St. Louis Blues' David Backes (42) during the second period in Game 2 of a first-round NHL hockey playoff series on Saturday, April 19, 2014, in St. Louis. (AP Photo/Bill Boyce)
Detroit Red Wings' Pavel Datsyuk (13) is congratulated by teammate Johan Franzen after scoring against Boston Bruins goalie Tuukka Rask, left, during the third period of Detroit's 1-0 win in Game 1 of a first-round NHL playoff hockey series, in Boston on Friday, April 18, 2014. (AP Photo/Winslow Townson)
Detroit Red Wings' Pavel Datsyuk lets go a shot as Boston Bruins defenseman Zdeno Chara (33) defends during the third period of Detroit's 1-0 win in Game 1 of a first-round NHL playoff hockey series, in Boston on Friday, April 18, 2014. (AP Photo/Winslow Townson)