It is hoped that they will both return to full training, with a decision on their availability set to be confirmed at Friday's team announcement.
Dominic Ryan successfully came through his first appearance since October, against the Scarlets. The young back rower was one of eight recent Leinster Academy graduates on the field of play by the time Fergus McFadden slotted home the match-winning penalty.
Clontarf centre O'Shea is one of 29 other Academy graduates across the Leinster panel this season, not including the likes of Leo Cullen, Shane Jennings and Brian O'Driscoll, for example, whose earlier careers were honed in the IRFU National Academy in the late 1990s.
McFadden scored all 16 points for the province against the Scarlets at the RDS, in a game which also marked Heinke van der Merwe's 50th appearance for the province.
The Fright night fixture also marked Leinster's sixth annual 'Ladies Night' where over €5,000 was raised for Action Breast Cancer. Leinster Rugby gave their sincere thanks to the OLSC and all of their supporters for raising funds on the night.