Born in Mullagh, County Galway, Reddin first played competitive hurling at juvenile levels with his club. He arrived on the inter-county scene at the age of seventeen when he first linked up with the Galway minor team before later joining the junior team. He made his senior debut during the 1941 championship. Reddin later joined the Tipperary team during the 1947–48 league and went on to play a key part for almost decade. During that time he won three All-Ireland medals, three Munster medals and five National Hurling League medals.
