Brad Marchand has been diagnosed with a mild concussion. Marchand was injured in last night’s second period when he was elbowed by New Jersey’s Anton Volchenkov. The Devils defenseman was suspended for four games for the hit. The Bruins are already without Patrice Bergeron, Marchand’s usual center, because of a concussion. Neither will play tonight against New Jersey. Marchand is the team’s leading scorer with 16 goals and 17 assists for 33 points. Marchand is averaging 17:10 of ice time per game, including 1:55 on the power play and 1:11 on the penalty kill. Marchand is one of the team’s most important all-around forwards.