Club McColgan won a
Donegal Junior Football Championship title with his club in 2024, scoring the second goal of the final against
Carndonagh. He later played for his club in the
2024–25 All-Ireland Junior Club Football Championship final at
Croke Park, scoring two points in the second half. Before this Naomh Pádraig Uisce Chaoin had defeated Tara in the quarter-final in London and
Kilmurry of Cork on penalties in the semi-final, also played in Dublin.
Inter-county McColgan was part of a Donegal under-20 team that won the 2022 Leo Murphy Cup. He made his senior inter-county debut against
Antrim in the
2022 Dr McKenna Cup. McColgan made his league debut for Donegal against
Kerry in the opening fixture of the
2023 National Football League; Donegal defeated Kerry, with McColgan scoring 0–3 on his debut and being named man of the match. He was later included on the GAA.ie Football Team of the Week. Then he was nominated for Footballer of the Week. He won. McColgan started the second league fixture against
Tyrone. He also started the third fixture against
Monaghan, the fourth fixture against
Galway and the fifth fixture against
Armagh. Against
Mayo, McColgan also started, playing in the number 4 jersey. However, he did not feature in the concluding fixture, against
Roscommon. McColgan started the
2023 Ulster Senior Football Championship quarter-final against Down. In Donegal's three games in Group 4 of the
2023 All-Ireland Senior Football Championship, McColgan made a substitute appearance against
Clare and started the second and third games, against
Derry and Monaghan. In the 2023 All-Ireland SFC preliminary quarter-final loss to Tyrone, McColgan started and scored 0–1. In October 2023, it was confirmed that McColgan had had surgery in London to correct an injury to his
hamstring. ==Personal life==