Van der Merwe's double for Scarlets beats Leinster
Scarlets 25-14 Leinster
Canada's World Cup star DTH van der Merwe crossed twice as Guinness Pro12 leaders Scarlets stretched their unbeaten start to four games with a 25-14 victory over Leinster at Parc y Scarlets.
Van der Merwe, who scored a try in each of Canada's four World Cup pool games, celebrated a score in each half after flanker James Davies opened the try scoring, but the Scarlets would have been disappointed not to have got a bonus point.
For Leinster the try scorers in the second half were full-back Isa Nacewa and replacement James Tracy.
As well as debutant Van der Merwe, Aled Davies, Aled Thomas and Steven Shingler came into the Scarlets' back division while hooker Kirby Myhill took over from the injured Emyr Phillips from the 20-8 win at Zebre.
Leinster coach Leo Cullen made five changes from the side which defeated the Newport Gwent Dragons including a first start for fly-half Ross Byrne.
Scarlets adopted an expansive approach and led 15-0 after largely dominating the first half.
It was all Scarlets early on as a fourth-minute penalty from Shingler was followed five minutes later by a try for flanker Davies, who was put over down the left by captain John Barclay.
It was Leinster pressure which actually produced a runaway try for Van der Merwe, who picked off possession in his own 22 and running in unopposed from 75 metres, which Shingler converted. .
Matters did not get much better for the Irishmen after the interval, with centre Noel Reid handed a yellow card in the 43rd minute for a cynical ruck offence.
And against 14 men Scarlets scored their third try, Van der Merwe's second, to see them lead 22-0 on 53 minutes. They were to score another penalty, but it was Leinster who ended the game scoring tries.
First Nacewa went over and a minute from time Tracy did the same from short range, a try converted by McFadden