Barry-Murphy was appointed captain of the team in 1929 and won a fourth successive Munster medal as Cork made it four-in-a-row following a 4-6 to 2-3 defeat of Waterford. On 1 September 1929 Cork faced Galway in the All-Ireland final for the second successive year. Little had changed in a year as Cork were on the top of their game again. A rout ensued as "the Rebels" and Barry-Murphy claimed a third All-Ireland title from four final appearances with a 4-9 to 1-3 victory. He also had the honour of lifting the Liam MacCarthy Cup.