For forty years, Hewitt was Canada's premier hockey play-by-play broadcaster for the General Motors (later Imperial Oil) Hockey Broadcast on Saturday nights. This show on Canadian national radio featured the Maple Leafs from Maple Leaf Gardens, and Hewitt became famous for the phrase "He shoots, he scores!" as well as his sign-on at the beginning of each broadcast, "Hello, Canada, and hockey fans in the United States and Newfoundland." (Newfoundland was an independent Dominion before joining Canada in 1949.)