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Carlow man Ed Byrne also resumes a bench role for Leinster this week.
Ireland and Lions prop Tadhg Furlong will play his first match in a year tomorrow.
Having recovered from a calf issue and been included in the Six Nations squad this week, he's been named to start for Leinster against Scarlets in the Guinness PRO14.
Offaly's Peter Dooley returns to the front row alongside Furlong, Carlow's Ed Byrne fills one of the spots on the bench.
Scrum-half Luke McGrath will captain the defending champions in Wales while teenager Jamie Osborne is in line to win his first cap from the bench.
Here is your #LeinsterRugby team to face Scarlets tomorrow at Parc y Scarlets in the #GuinnessPRO14! 🤩🔵✊#SCAvLEI pic.twitter.com/uOWZCFIaun
— Leinster Rugby (@leinsterrugby) January 29, 2021
Meanwhile, Munster head-coach Johann van Graan has made 13 changes for their trip to Benetton.
Gavin Coombes and Mike Haley are the only players retained from last week's defeat to Leinster.
Tight-head prop Roman Salanoa has been handed his first start for the Reds in the league.
📢 TEAM ANNOUNCEMENT | The Munster side to face Benetton in Italy tomorrow has been named.@FineenWych & @JoshWych123 start together for the first time with the Scannell brothers and the Coombes cousins also named in the XV.
— Munster Rugby (@Munsterrugby) January 29, 2021
Full details ⤵️#BENvMUN #GuinnessPRO14 #SUAF 🔴