Although Dooley will have to make do with a run from the bench this week.
Robbie Henshaw retains his place in the Leinster team for the visit of Northampton in the Champions Cup tomorrow.
He'll resume his partnership with Gary Ringrose in the centre.
After a strong performance last weekend, Birr's Peter Dooley drops to the bench to back up Cian Healy in the front row.
.@harrybyrne23 and Ryan Baird make their first European starts and @Ringrose_G returns to face @SaintsRugby! 🔵👊#LEIvNOR#HeinekenChampionsCup pic.twitter.com/quNBnQlinX
— Leinster Rugby (@leinsterrugby) December 18, 2020
Elsewhere, Prop Josh Wycherely will make his first European start for Munster away to Clermont.
Rhys Marshall replaces hooker Kevin O’Byrne, while Shane Daly’s in for Andrew Conway on the wing.
Out west, Bundee Aki and Conor Oliver replace Tom Daly and Jarrad Butler in the Connacht starting fifteen for Sunday’s meeting with Bristol.
The fit-again Billy Burns starts at out-half for Ulster’s trip to Gloucester tomorrow.
Elsewhere, David O’Connor, Jordi Murphy and Nick Timoney replace Sam Carter, Matty Rea and Marcell Coetzee.
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