In the 1930–31 season, he played all 44 games again, and was named to the Second All-Star team. In the playoffs, Boston lost the semifinals to the Montreal Canadiens; during game two of the series Thompson became the first goaltender to be pulled for a sixth attacker at the end of a game to give his team a higher chance to score a goal. Even though Boston still lost, coach Art Ross' maneuver was described as "amazing" the following day, and this technique, known as "open net", caught on with the rest of the league.