A last-gasp goal from Harry Ruddle helped Ballygunner claim a first-ever A-I-B All-Ireland club hurling title.
The substitute struck with the last puck of the game to help his side to a 2-17 to 1-19 win over Ballyhale Shamrocks of Kilkenny.
It's the first time a club from Waterford has claimed the All-Ireland crown.
Dublin have their first win of this year's Allianz Hurling League Division One campaign.
They overcame the challenge of Antrim by 2-19 to 2-15 at Corrigan Park.
Later, All-Ireland champions Limerick welcome Henry Shefflin's Galway to the Gaelic Grounds.
Throw-in for their meeting is at 7pm.
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All-Ireland senior women's football champions Meath have made a winning start to their Division One campaign.
The Royals beat Cork by 2-7 to 1-8 at Pairc Tailteann this afternoon.
