Jack McGill was born September 19, 1921 in Edmonton, Alberta. A member of the EJrHL's Edmonton Athletic Club, McGill twice led his team to back-to-back Memorial Cup tournaments in 1939-1940.
A skilled forward, McGill signed with the EAHL's Boston Olympics in 1941-42 and spent the majority of the season with the club while seeing his first action in the NHL with the Boston Bruins. Although he only played 13 games with the Bruins, McGill still managed to register 19 points (8-11-19).
Following an impressive debut with the Bruins, McGill spent the next two seasons in the OCHL, QSHL and WNDHL while representing Ottawa Commandos at the 1943 Allan Cup tournament. In 1944-45 McGill returned to the Bruins lineup and went on to play a more prominent role with the club over the course of the next three seasons. Although he spent the majority of his playing time with Boston, McGill would also see some action with the AHL's Hershey Bears during the 1946-47 season and the entire 1947-48 season.
In the summer of 1948, the Montreal Canadiens acquired McGill from Boston and over the next four seasons saw most of his playing time with the AHL's Providence Reds. After four solid years in Providence, McGill joined the WHL's Edmonton Flyers before retiring from the game after one season with the WHL's New Westminster Royals in 1953-54.