As a youth, Colley played in the 1966
Quebec International Pee-Wee Hockey Tournament with the Toronto Weston
minor ice hockey team. Born in
Toronto, Ontario, Colley played junior hockey for the
Niagara Falls Flyers and the
Sudbury Wolves, scoring 117 points, including 81 assists. Colley was drafted 57th overall by the
Minnesota North Stars in the
1973 NHL Amateur Draft and 38th overall by the
New England Whalers in the
1973 WHA Amateur Draft. Like most WHA draftees, Colley chose to report to the NHL and signed with the North Stars, playing one game for the North Stars during the
1974-75 NHL season. He was assigned to the
New Haven Nighthawks of the
American Hockey League and spent a total of seven seasons with the team, helping them to two division titles in 1979 and 1980 as well as the regular season title in 1980. He also made the
Calder Cup finals three times with the Nighthawks, in 1975, losing to the
Springfield Indians, and in 1978 and 1979, losing to the
Maine Mariners on both occasions. He is the Nighthawks' all-time leader in goals (204), assists (281), points (485), and games (534). In 1980, Colley spent a season with the
Binghamton Whalers before spending the next five seasons playing senior hockey for the
Collingwood Royals. He retired as a player in 1986. Colley died on November 17, 2021. ==Career statistics==