The Boston Bruins forward is facing discipline for cross-checking against Montreal Canadiens forward Mike Hoffman on Thursday.
The incident occurred during a face-off in front of the Bruins bench at 17:08 of the first period of Boston's 4-2 win at TD Garden. Greer received a major penalty for cross-checking and a game misconduct. Hoffman finished the game for Montreal.
The following grounds are being considered for supplemental discipline: cross-checking. However, the Department of Player Safety retains the right to make adjustments to the infraction upon review.