 Chamberlain, whose first name was spelled "Irwin" in his hometown newspaper, reportedly began his hockey career in Shawville, PQ.He was reportedly added to the Toronto Maple Leafs reserve list by 1937 after steadily improving his game while playing in Northern Ontario.In April 1937 he scored 4 goals and 2 goals respectively for the Sudbury Tigers in a two-game Eastern Canada senior amateur hockey finals against the Hull Volants.