Complex sentence: However he returned to the game in 1933 when he became the managing director of the NHL in, resigning to become head coach of the Boston Bruins in 1934, a post he held until 1936.
Split into simpler sentences: However he returned to the game in 1933 when he became the managing director of the NHL in. Patrick would hold this resigning to become head coach of the Boston Bruins in 1934, a post he held until 1936.