Boston Bruins' Matt Grzelcyk, center, is assisted from the ice by Jake DeBrusk, left, and David Krejci, right, after an injury during the first period in Game 2 of the NHL hockey Stanley Cup Final against the St. Louis Blues, Wednesday, May 29, 2019, in Boston. (AP Photo/Michael Dwyer)

Boston Bruins' Matt Grzelcyk lies injured on the ice during the first period in Game 2 of the NHL hockey Stanley Cup Final against the St. Louis Blues, Wednesday, May 29, 2019, in Boston. (AP Photo/Charles Krupa)