NHL teams are realizing that a backup goaltender is an important position these days. With back-to-backs and travel, the starter needs a rest. And the No. 2 guy really proves his worth if the starter gets injured. Four goalies who were selected to the All-Star Game are injured. Some teams are down to their third guy. Boston Bruins coach Bruce Cassidy just knows he's glad he had Jaroslav Halak ready to go when Tuukka Rask was injured.