The scrum half has suffered a knee injury.
Leinster scrum-half Luke McGrath may not play again this year.
He has been ruled out for up to eight weeks with a knee ligament injury he picked up plying for the province in the URC.
Cian Healy meanwhile is continuing his recovery from a shoulder injury and no update on a possible date of return has been given.
Leinster's next game is against Edinburgh at the RDS on Saturday.
Luke McGrath has been ruled out for up to eight weeks with a knee ligament injury.
— Leinster Rugby (@leinsterrugby) October 30, 2023
See the Injury Report here 👉 https://t.co/zco3Fm0gaf#FromTheGroundUp pic.twitter.com/sBPMH5jIHW