British and Irish Lion Tadhg Furlong will continue to ply his trade in his homeland for at least another season.
Gregory Alldritt and Will Skelton helped La Rochelle overcome Leinster in Sunday's European Champions Cup semi-final.
Ireland and Leinster will continue to enjoy the services of Johnny Sexton after the fly-half agreed an IRFU contract extension.
After missing out on Six Nations glory, Ireland have named three uncapped players in their squad for the Autumn Nations Cup.
Garry Ringrose is facing another spell on the sidelines after breaking his jaw early in Ireland's thumping Six Nations win over Italy.
Jordan Larmour will undergo surgery this week and will not be available to Andy Farrell for Ireland's upcoming internationals.
Holders Saracens are a win away from the Champions Cup final after beating Leinster, while Racing 92 powered past Clermont Auvergne.
Leinster cruised to a record seventh Pro14 title as they defeated fellow Irish side Ulster 27-5 in Dublin in Saturday's final.
There will be an all-Irish final in Pro14 after Ulster came from behind to defeat Edinburgh and book a date with Leinster.
The Scarlets can still quality for the Pro14 play-offs next week after beating the Dragons, but they need Connacht to do them a favour.