[1] Born in the College Road of Galway, Duggan first played competitive hurling whilst at school at St Patrick's College.
Duggan joined the senior team during their successful 1950-51 National Hurling League campaign.
[3] Duggan's brothers, Seánie and Paddy, also played hurling for Galway, while their sister, Monica, played camogie for Galway.
[4] He spent his working life with Kelly Office Printing and retired after reaching the position of manager.
Duggan was also involved in the promotion of underage hurling in Galway and held numerous officer roles in divisional boards and at county level and served as vice-chairman of the Galway County Board for a period.