Gregor Bruce MacKellar (born July 22, 1998) is a Canadian professional football offensive lineman who is a member of the Edmonton Elks.

[1] Following a coaching change, MacKellar sought a transfer and moved back to Nova Scotia to become a member of the St. Francis Xavier X-Men in time for the 2018 season.

In his fourth and final year, in 2021, he was named a U Sports Second Team All-Canadian and again won the Loney Bowl in a victory over the Bishop's Gaiters.

[5] Following training camp, he was placed on the injured list, but soon after played in his first career professional game on July 4, 2022, against the Winnipeg Blue Bombers.

[3] His first game played outside of Toronto's BMO Field was in Wolfville, Nova Scotia as part of Touchdown Atlantic where he dressed as a backup offensive lineman in his home province.