Mezue ahịrịokwu na-esonụ: Mgbe o bichara na Goodeve, Saskatchewan, na Melville, Saskatchewan, n'oge ọ bụ nwata, McLellan malitere ọrụ ya na Saskatoon Blades nke Western Hockey League (WHL) site na 1983 ruo 1987. N'ime
1986 NHL Entry Draft, ndị New York Islanders họpụtara ya na agba nke ise. Ọ gbara egwuregwu ise n'ogo NHL, na-etinye ihe ka ukwuu n'ime oge abụọ na ndị otu Islanders 'American Hockey League (AHL), ndị Springfield Indians. Agbanyeghị, mmerụ ahụ na-eme ugboro ugboro n'ubu na-alaghachi n'oge ọ na-eto eto hockey ụbọchị mechiri ọrụ McLellan na North America na-egwu egwu mgbe oge 1988-89 gasịrị. O nyere goolu NHL ya naanị ya na egwuregwu mbụ ya na Disemba 28, 1987 na 6-4 meriri New Jersey Devils.