Leinster Rugby continued their excellent start to the United Rugby Championship with a 50-15 Round 4 win over Scarlets at the RDS Arena.

Leading by 22-8 at the break despite trailing twice early on, the hosts would overpower their visitors further in the second half with replacement front-rowers Dan Sheehan and Cian Healy combining for three tries.

Caelan Doris would also dot down in that second half making it a successful night on the scoreboard for Leinster forwards, Rónan Kelleher and Andrew Porter also crossing the whitewash.

Sam Costelow and Johnny Sexton swapped penalties in the opening 10 minutes before the visitors struck again. Johnny McNicholl got over in the corner after good link-up play with his full-back Ioan Nicholas.

Again, the lead was shortlived, Kelleher bounding through off the back of a lineout maul for his second try in as many games.

Sexton’s conversion was wide of the mark leaving the sides level again, but only briefly.

The front row flexed their muscle a few moments later, this time Porter was the one to ground and Leinster worked themselves into a 15-8 lead.

They would come again soon after, bombarding the Scarlets line with little reward until a penalty try was awarded on the stroke of half-time.

The pack started the second half as they had finished the first and within five minutes, Doris was etching his name onto the scoresheet. The Mayo man showing his power to secure the bonus point on the night.

As the replacements rolled on for both sides, it was the new Leinster front row who would have the final say. Lezana pulled one back for Scarlets which was converted by Dan Jones but then Healy and Sheehan responded.

First, Healy burrowed over from close range with the try awarded after a TMO review and then Sheehan repeated Kelleher’s feat of rolling off the back of a maul to dot down.

Sheehan’s second came from a crossfield kick that broke backwards off the hooker and he was able to react quickest and run in under the posts.