The Leafs did spend time in Boston's zone in the second period, but for too much of it, their offensive-zone play was limited to the perimeter, and as a result, the Bruins outshot Toronto 7-1 to start the period and added their third goal of the night at 7:57 of the second.
Toronto had a handful of near-misses on Rask, but Boston dictated much of the play in the middle frame, and outshot the Buds 16-9 in the second. It doesn't matter if it's the regular-season or the post-season, that type of differential doesn't speak well for the Leafs' chances of pulling out a comeback win.