Morenz played junior hockey with the Oshawa Generals of the Ontario Hockey Association (OHA) from 1965 to 1968. He was drafted by the Chicago Black Hawks 21st overall in the 1966 NHL Amateur Draft. He was a member of the 1966 OHA champion Generals, but he did not play with the team in the Memorial Cup final as he was recovering from a fractured skull. After junior, he moved on to university, playing with the University of Denver Pioneers from 1968 until 1972. In 1972, he was drafted by New York Raiders in 1972 WHA Player Selection Draft, then started his pro career with the Raiders in 1972-73. He stayed with the franchise for four seasons, as it became the New York Golden Blades and New Jersey Golden Knights, then moved to San Diego to become the San Diego Mariners. He sat out the 1976-77