Detroit Red Wings defenseman Niklas Kronwall (55) is checked into the boards by Chicago Blackhawks center Andrew Shaw (65) during the first period in Game 7 of the NHL hockey Stanley Cup Western Conference semifinals, Wednesday, May 29, 2013, in Chicago. (AP Photo/Nam Y. Huh)

Detroit Red Wings defenseman Niklas Kronwall (55) and Chicago Blackhawks left wing Bryan Bickell (29) collide during the first period in Game 7 of the NHL hockey Stanley Cup Western Conference semifinals, Wednesday, May 29, 2013, in Chicago. (AP Photo/Nam Y. Huh)

Chicago Blackhawks right wing Marian Hossa (81) hugs Detroit Red Wings defenseman Niklas Kronwall (55) after the Blackhawks defeated the Red Wings 2-1 in overtime in Game 7 of the NHL hockey Stanley Cup Western Conference semifinals, Wednesday, May 29, 2013, in Chicago. (AP Photo/Nam Y. Huh)

CHICAGO, IL - MAY 29: Jonathan Toews #19 of the Chicago Blackhawks hits Niklas Kronwall #55 of the Detroit Red Wings in front of Jimmy Howard #35 in Game Seven of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 29, 2013 in Chicago, Illinois. The Blackhawks defeated the Red Wings 2-1 in overtime. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 29: Patrick Kane #88 of the Chicago Blackhawks passes under pressure from Niklas Kronwall #55 of the Detroit Red Wings in Game Seven of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 29, 2013 in Chicago, Illinois. The Blackhawks defeated the Red Wings 2-1 in overtime. (Photo by Jonathan Daniel/Getty Images)

Detroit Red Wings defenseman Niklas Kronwall (55) and Chicago Blackhawks left wing Bryan Bickell (29) collide during the first period in Game 7 of the NHL hockey Stanley Cup Western Conference semifinals, Wednesday, May 29, 2013, in Chicago. (AP Photo/Nam Y. Huh)

Detroit Red Wings defenseman Niklas Kronwall (55) is checked into the boards by Chicago Blackhawks center Andrew Shaw (65) during the first period in Game 7 of the NHL hockey Stanley Cup Western Conference semifinals, Wednesday, May 29, 2013, in Chicago. (AP Photo/Nam Y. Huh)

CHICAGO, IL - MAY 29: Bryan Bickell #29 of the Chicago Blackhawks takes down Niklas Kronwall #55 of the Detroit Red Wings in Game Seven of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 29, 2013 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images)

Chicago Blackhawks' Andrew Shaw (65) and Detroit Red Wings' Niklas Kronwall (55) battle as they wait for the puck during the second period of Game 5 of the NHL hockey Stanley Cup playoffs Western Conference semifinals in Chicago, Saturday, May 25, 2013. The Blackhawks won 4-1. (AP Photo/Nam Y. Huh)

CHICAGO, IL - MAY 25: Niklas Kronwall #55 of the Detroit Red Wings grimaces on the bench after suffering a hit by the Chicago Blackhawks in Game Five of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 25, 2013 in Chicago, Illinois. The Blackhawks defeated the Red Wings 4-1. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 25: Bryan Bickell #29 of the Chicago Blackhawks and Niklas Kronwall #55 of the Detroit Red Wings battle for the puck in Game Five of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 25, 2013 in Chicago, Illinois. The Blackhawks defeated the Red Wings 4-1. (Photo by Jonathan Daniel/Getty Images)

Chicago Blackhawks' Andrew Shaw (65) and Detroit Red Wings' Niklas Kronwall (55) battle as they wait for the puck during the second period of Game 5 of the NHL hockey Stanley Cup playoffs Western Conference semifinals in Chicago, Saturday, May 25, 2013. The Blackhawks won 4-1. (AP Photo/Nam Y. Huh)

CHICAGO, IL - MAY 25: Niklas Kronwall #55 of the Detroit Red Wings hits the ice after colliding with Duncan Keith of the Chicago Blackhawks in front of Jimmy Howard #35 in Game Five of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 25, 2013 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 25: Michal Handzus #26 of the Chicago Blackhawks moves between Niklas Kronwall #55 and Daniel Cleary #11 of the Detroit Red Wings in Game Five of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 25, 2013 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 25: Michal Handzus #26 of the Chicago Blackhawks leaps to knocks down the puck over Niklas Kronwall #55 of the Detroit Red Wings in Game Five of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 25, 2013 in Chicago, Illinois. (Photo by Jonathan Daniel/Getty Images)

Detroit Red Wings defenseman Niklas Kronwall (55), of Sweden, celebrates with goalie Jimmy Howard (35) after defeating the Chicago Blackhawks 2-0 in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall (55), of Sweden, defends Chicago Blackhawks center Jonathan Toews (19) during the first period in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs series in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall, center, of Sweden, checks Chicago Blackhawks center Jonathan Toews (19) away from goalie Jimmy Howard (35) during the first period in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall (55), of Sweden, celebrates with goalie Jimmy Howard (35) after defeating the Chicago Blackhawks 2-0 in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall (55), of Sweden, defends Chicago Blackhawks center Jonathan Toews (19) during the first period in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs series in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall, center, of Sweden, checks Chicago Blackhawks center Jonathan Toews (19) away from goalie Jimmy Howard (35) during the first period in Game 4 of the Western Conference semifinals in the NHL hockey Stanley Cup playoffs in Detroit, Thursday, May 23, 2013. (AP Photo/Paul Sancya)

Detroit Red Wings defenseman Niklas Kronwall (55), of Sweden, tries to slow Chicago Blackhawks right wing Marian Hossa (81), of the Czech Republic, during the first period of an NHL hockey Stanley Cup playoffs Western Conference semifinal game in Detroit, Monday, May 20, 2013. (AP Photo/Paul Sancya)

CHICAGO, IL - MAY 18: Bryan Bickell #29 of the Chicago Blackhawks hits Niklas Kronwall #55 of the Detroit Red Wings in the back in Game Two of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 18, 2013 in Chicago, Illinois. The Red Wings defeated the Blackhawks 4-1. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 18: Jimmy Howard #35 of the Detroit Red Wings celebrates a win with teammate Niklas Kronwall #55 over the Chicago Blackhawks in Game Two of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 18, 2013 in Chicago, Illinois. The Red Wings defeated the Blackhawks 4-1. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 18: Jimmy Howard #35 of the Detroit Red Wings makes a save against Daniel Carcillo #13 of the Chicago Blackhawks as Niklas Kronwall #55 moves to clear the puck in Game Two of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 18, 2013 in Chicago, Illinois. The Red Wings defeated the Blackhawks 4-1. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 18: Jonathan Toews #19 of the Chicago Blackhawks tries to shoot the puck as he is shoved by Niklas Kronwall #55 of the Detroit Red Wings in front of Jimmy Howard #35 in Game Two of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 18, 2013 in Chicago, Illinois. The Red Wings defeated the Blackhawks 4-1. (Photo by Jonathan Daniel/Getty Images)

CHICAGO, IL - MAY 15: Brandon Saad #20 of the Chicago Blackhawks moves up the ice chased by Niklas Kronwall #55 and Jonathan Ericsson #52 of the Detroit Red Wings in Game One of the Western Conference Semifinals during the 2013 NHL Stanley Cup Playoffs at the United Center on May 15, 2013 in Chicago, Illinois. The Blackhawks defeated the Red Wings 4-1. (Photo by Jonathan Daniel/Getty Images)

ANAHEIM, CA - MAY 12: (L-R) Daniel Cleary #11, Jonathan Ericsson #52 and Niklas Kronwall #55 of the Detroit Red Wings celebrate their teams 3-2 victory over the Anaheim Ducks in Game Seven of the Western Conference Quarterfinals during the 2013 NHL Stanley Cup Playoffs at Honda Center on May 12, 2013 in Anaheim, California. (Photo by Jeff Gross/Getty Images)

ANAHEIM, CA - MAY 12: Niklas Kronwall #55 of the Detroit Red Wings is pursued by David Steckel #20 of the Anaheim Ducks for the puck in the first period of Game Seven of the Western Conference Quarterfinals during the 2013 NHL Stanley Cup Playoffs at Honda Center on May 12, 2013 in Anaheim, California. The Red Wings defeated the Ducks 3-2. (Photo by Jeff Gross/Getty Images)

ANAHEIM, CA - MAY 08: Matt Beleskey #39 of the Anaheim Ducks is checked by Niklas Kronwall #55 of the Detroit Red Wings in the first period of Game Five of the Western Conference Quarterfinals during the 2013 NHL Stanley Cup Playoffs at Honda Center on May 8, 2013 in Anaheim, California. The Ducks defeated the Red Wings 3-2 in overtime. (Photo by Jeff Gross/Getty Images)