Leinster Head coach Leo Cullen has issued an injury update ahead of the Guinness PRO14 Rainbow Cup game against Connacht Rugby on Saturday in the Sportsground.
"Rowan Osborne (hand) and Ciarán Frawley (hamstring) came through the final stages of their rehab last week and took their place amongst the replacements at the weekend and will continue to train this week as normal", the club said in a statement.
"Three players need further assessment this week or are still following the final stages of their rehabilitation programmes.
"Jamison Gibson-Park is still being managed with a hamstring injury and will be further assessed this week, while Caelan Doris, who picked up a minor calf injury during the captain’s run ahead of the Munster Rugby game, also requires further assessment.
"Jimmy O’Brien will again increase his training load this week as he looks to return from his hamstring injury.
"Unfortunately Rhys Ruddock and Harry Byrne are definitely unavailable this week.
"Ruddock injured his calf in the first half against La Rochelle and will be unavailable for between four to six weeks and Byrne, who was replaced early in the game against Munster Rugby with a hamstring injury, will be unavailable for three to four weeks.
"There was no new injury update on the following players:
Johnny Sexton (concussion), Will Connors (knee), Jack Dunne (ankle), Adam Byrne (quad), Dan Leavy (knee), Conor O’Brien (knee) and Max Deegan (knee)."