TROY -- It's official. Rensselaer will have to advance to the ECACH semifinals without Nick Bailen. The star senior defenseman tried to go but was not able to skate hard in warmups. He's replaced by freshman Phil Hampton, who hasn't played in two months.
   Bailen, RPI's leading scorer, was injured Saturday night while taking a kneeing penalty from Brown defenseman Dennis Robertson.
   If the Engineers don't win the game, Bailen's college career will be over.