The Vezina Trophy is awarded annually to the National Hockey League's goaltender who is "adjudged to be the best at this position". At the end of each season, the 30 General managers of the teams in the National Hockey League vote to determine the goaltender who was the most valuable to his team during the regular season. Before 1981, it was awarded to the goaltender(s) the team allowing the fewest number of goals during the regular season; now, the William M. Jennings Trophy is awarded under this previous definition.