Watch: 'What's Porridge's real name?' - Leinster star James Lowe impressed by academy youngsters
Leinster moved three points clear of Scarlets at the top of Guinness PRO14 Conference B standings after beating the Welsh side 20-13 at the RDS.
Johnny McNicholl's sixth-minute try shot Scarlets ahead but Leinster made the most of their opportunities, as man-of-the-match James Lowe's brace of unconverted tries made it 10-7 at the break.
Lowe then turned provider for Luke McGrath's try just after the restart.
Leinster's 20-year-old debutant Ciaran Frawley kicked the conversion and a 69th minute penalty, but two place-kicks from Dan Jones - the second with the last kick of the game - earned Scarlets a hard-earned losing bonus point.
Speaking after the game, Lowe said he was pleased with the win but conceding a losing bonus point to their conference rivals could prove costly later in the competition.
"We came here to do a job and we're happy with the outcome," he said.
"We're disappointed that we did concede it (the losing bonus point). There were big moments throughout that game. I mean that last scrum that gave them that penalty for the bonus point. It could come back to bite us later on.
Substitute flyhalf Frawley impressed on his first showing and Will Connors also caught the eye for Leo Cullen's side.
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"We've got young fellas coming in. I guess a lot of the academy has been training with us full time for the last few weeks," Lowe added.
"It doesn't matter who comes down from that international set-up, they've got to catch back up to us.
"We're doing the work to ensure we're the best we can and if we get internationals back then awesome, if not, we've got guys who step up week-in week-out through this Six Nations period.
"Frawley, today he played 60-odd minutes and played really well. He was a little out of position from what he's used to but he did everything he needed to do. He made some important tackles, he passed when he needed to pass. Credit to him.
"What's Porridge's name? The reserve 7, I only know him by his nickname. I gotta learn a lot of names," he said to giggles from the watching media.
"I don't know if he knows my name either."