Even though the Bruins and Senators trade focused on goaltenders Linus Ullmark and Joonas Korpisalo, Boston picked up a significant piece to solidify its bottom-six forward group.
Mark Kastelic is a physical, heavy player who has a history of blowing up opponents with big hits. Last season, he ranked fifth in hits (126) and second in faceoffs (54.4%) in 63 games for Ottawa.
Bruins general...