**Leinster etched their name into Guinness PRO14 history in Dublin on Saturday night by becoming the first team to be crowned champions three years in a row.** Leo Cullen’s unstoppable blue machine overcame Ulster 27-5 in an all-Irish Final at the Aviva Stadium for their 17th win out of 17 games to complete a perfect season. It is only the second time in the club’s history that they have finished the campaign unbeaten, eclipsing their 10-game winning run en route to competition’s inaugural 2001/02 title.