Club Morrison won the
2014 Donegal Senior Football Championship with his club. He then played against
Roslea Shamrocks in the quarter-final and
Omagh in the semi-final of the
2014 Ulster Senior Club Football Championship, scoring a point in the latter. Morrison then won the
2024 Donegal Senior Football Championship with his club.
Inter-county Under the management of
Rory Gallagher, Morrison was named as a replacement for the
2017 Ulster Senior Football Championship match against
Antrim. Under the management of
Declan Bonner, Morrison played the full final of the
2018 Dr McKenna Cup, which
Donegal won and ended
Tyrone's six-year streak of wins. Morrison started against
Tyrone and
Monaghan in the
2018 National Football League, completing both games. He also came on as a substitute against
Mayo in the same competition. His game-time was limited, first by
concussion then by a fractured ankle sustained during a training session following the league game against
Kildare (in which he did not play). Morrison started against
Clare and
Meath (regular fixture, not the final) in the
2019 National Football League, completing both games. He did not feature in any further games, as
Donegal won the National Football League Division 2 title. In April 2019, it was reported that Morrison had left the Donegal panel. He thus missed Donegal's
2019 Ulster Senior Football Championship title win. He returned to the
Donegal senior panel ahead of the
2020 Dr McKenna Cup. Morrison made one substitute appearance for Donegal in the
2020 National Football League, in the opening fixture against Mayo. Then the
COVID-19 pandemic brought
play to a halt. With play resuming locally in August, Morrison sustained another injury while performing for his club at Fintra during the
2020 Donegal Senior Football Championship (Round 3 of the
League Stage) and was stretchered from the field of play. He later described the experience as follows: "''It was August 16. When I went down, there was a pop and a sort of tear. And you just know. Usually, you get a bang and you think about getting back up. I knew I wasn't getting back up. There was just that amount of pain''". ==Style of play==