At club level he played with Austin Stacks, Dohenys and Clonakilty and was a member of the Cork and Kerry senior football teams.
Moriarty first came to Gaelic football prominence as a student with Tralee CBS, winning consecutive Corn Uí Mhuirí titles in 1944 and 1945.
His occupation as a bank official resulted in him joining lining out with a number of clubs, firstly with Dohenys in Dunmanway and later with Clonakilty.
Born in Cappagh, Castlegregory, Moriarty began his banking career with AIB in Dunmanway, before progressing through the ranks in Clonakilty and Cork city.
Moriarty returned to Cork for a period before taking up the position of manager of the Castle Street branch of AIB in Tralee in the early 1970s.