Near the end of the 1988–89 NHL season, MacLellan was acquired by the Calgary Flames for their playoff drive, which paid off as the Flames won the Stanley Cup. He would remain with the Flames for two more seasons. He would close out his NHL career playing with the Detroit Red Wings for the 1991–92 season.
Post-playing career
On May 26, 2014, MacLellan was named senior vice president and general manager of the Washington Capitals. MacLellan had been a fixture in Washington for the previous 13 seasons, serving first as a pro scout, then as director of player personnel and, for the seven seasons prior to being named the general manager, as assistant general manager under George McPhee. MacLellan and McPhee had been childhood friends and teammates in Guelph, Ontario and also college teammates at Bowling Green.[1] The Washington Capitals won the Stanley Cup under MacLellan in 2018.
Following the 2023–24 season, MacLellan was succeeded as general manager of the Capitals by Chris Patrick, while retaining his role as president of hockey operations.[2]