Explanation:
Video review confirmed the referee's call on the ice that Boston's Connor Clifton made contact with goaltender Felix Sandstrom in the crease that impaired his ability to play his position prior to David Pastrnak's goal. The decision was made in accordance with Rule 69.1, which states in part, "Goals should be disallowed only if: (1) an attacking player, either by his positioning or by contact, impairs the goalkeeper's ability to move freely within his crease or defend his goal."
Penalty: 2:00 minor penalty: Delay of Game - Unsuccessful Challenge