It was a first the Air Force Academy’s hockey won’t brag about: the first time this season it was shutout. The Falcons were held scoreless in their NCAA tournament game against Boston College last Saturday, falling 2-0. Chris Kreider, a first-round NHL Draft selection in 2009, scored both of BC’s goals. Considering who (the country’s top-ranked team) and where (in a Worcester, Mass., arena filled with BC fans), you shouldn’t be disappointed. It was only the third time in the past 10 games where BC managed to score just two goals. The Eagles are averaging 3.6 goals per game in…