In 1941, the National League adopted the use of a helmet, designed by George Bennett, a Johns Hopkins University brain surgeon, for use by all teams in spring training. On March 8, 1941 the Brooklyn Dodgers announced that the team’s players would be wearing the helmets during regular season games. On April 26, 1941 the Washington Senators joined the Dodgers as the only two teams to fully adopt the batting helmet for regular season use. The New York Giants on June 6 and the Chicago Cubs on June 24 also joined the list of teams to fully adopt the use of protective helmets during games.