Bruins' general manager Peter Chiarelli has had a busy offseason so far. And it's not about to stop anytime soon. Chiarelli just re-signed centers Chris Kelly and Gregory Campbell this week, following the re-signing of forward Daniel Paille. With Tim Thomas still committed to sitting out the season, the Bruins must now look to re-sign goalie Tuukka Rask as the primary netminder. The Bruins still have room for several more roster changes down the road, as Chiarelli also expressed the desire to add a top-nine forward, and many anticipate Dougie Hamilton to have an impact on the defense in the 2012-13 season.