Marchand gave Boston a 2 - 1 lead midway through the third period .
Gryba 's slap shot deflected off Hoffman 's skate and past Rask to tie Boston .
Marchand gave Boston a 2 - 1 lead midway through the third period , but Gryba 's slap shot deflected off Hoffman 's skate and past Rask to tie it .