Against Connacht, Irish international scrum-half Craig Casey was playing for the first time since knee surgery in December and the 25-year-old came through the game unscathed.
Forwards Oli Jager, Jean Kleyn and Niall Scannell also returned from injury in the inter-provincial derby and are fit to face La Rochelle.
Flanker John Hodnett was forced off with a thigh contusion in Castlebar, however, and is a doubt for the game.
