JP Cooney, Shane O'Leary and Danny (Keelter) have all signed on to continue with the Pro12 winning side for the coming season.
Meanwhile Rory Moloney has been promoted from the Connacht Academy to join the senior ranks.
Elsewhere, Leinster's James Ryan is expected to captain the U20 Ireland side, as they prepare to face Wales tomorrow in the Rugby World Championships.
Ryan was the side's main injury concern after picking up a calf injury, but has been named in Nigel Carolan’s starting 15.
