Affectionately known simply as Mickey The Boy, he was totally dedicated to St. Eunan’s.
His funeral takes place tomorrow (Monday) morning at 10am in the Cathedral.
In a statement, St Eunan’s said Mr O’Donnell would be greatly missed by everyone at the club and by the wider community throughout Donegal.
The statement added: “We would like as many that are available to attend to wear their club colours to form a Guard of Honour at the Cathedral after Mass on Monday.”