Connacht fly-half Jack Carty has been ruled out for between one and three months after suffering a ruptured spleen on holiday in Dubai.
Carty suffered an unfortunate accident on a water slide. Following medical review, it was confirmed the 23-year-old ruptured his spleen.
He has had the spleen removed and will spend another week in hospital in Dubai, with Connacht also giving updates on other players.
"Matt Healy, who sustained a concussion in the recent win over the Scarlets, and Sean O'Brien, who was concussed in training, are both completing the final stages of the return-to-play protocols. It is hoped that both will be available for the clash with the Dragons in Newport," read a statement.
"Hooker Jason Harris-Wright, who was concussed in the Challenge Cup match away to Brive, has also been cleared to play this week. Prop JP Cooney, who underwent shoulder stabilisation surgery in October, played 60 minutes for Garryowen on Saturday and is now available for selection."