Lorimer started his National Hockey League career with the New York Islanders in 1976. He also played for the New Jersey Devils and Colorado Rockies. He retired after the 1986 season. He won 2 Stanley Cups with New York in 1980 and 1981. Lorimer played for the Michigan Tech Huskies and was drafted 129th overall by the New York Islanders in the 1973 NHL Amateur Draft. He turned pro in 1975 and spent the better part of the next three seasons in the minor pros. He made it as a regular with the Islanders in 1978 and was on their Stanley Cup-winning teams in 1980 and 1981.