Chicago Blackhawks' Patrick Kane looks up after missing a shot against the St. Louis Blues during the first period in Game 4 of a first-round NHL hockey playoff series in Chicago, Wednesday, April 23, 2014. (AP Photo/Nam Y. Huh)
St. Louis Blues' Adam Cracknell, right, is checked by Chicago Blackhawks' Brandon Saad during the first period in Game 4 of a first-round NHL hockey playoff series in Chicago, Wednesday, April 23, 2014. (AP Photo/Nam Y. Huh)
St. Louis Blues goalie Ryan Miller (39) blocks a shot by Chicago Blackhawks' Patrick Sharp (10) during the second period in Game 4 of a first-round NHL hockey playoff series in Chicago, Wednesday, April 23, 2014. (AP Photo/Nam Y. Huh)
St. Louis Blues' Maxim Lapierre (40) controls the puck against the Chicago Blackhawks during the second period in Game 4 of a first-round NHL hockey playoff series in Chicago, Wednesday, April 23, 2014. (AP Photo/Nam Y. Huh)
Chicago Blackhawks' Andrew Shaw (65) celebrates after scoring a goal during the second period in Game 4 of a first-round NHL hockey playoff series against the St. Louis Blues in Chicago, Wednesday, April 23, 2014. (AP Photo/Nam Y. Huh)