19 Jun, 17:04
Ronan O'Mahony is one of five Munster academy players moving to a senior development contract for season 2013/14.
Ospreys have lost just one game in the RaboDirect PRO12 this season, 17-28 at Glasgow in round seven and their only home defeat in the tournament in the last twelve months was 20-22 to Munster last April.
But revenge for that reversal was sweet, coming as it did in Thomond Park Stadium earlier this season when Ospreys ended an eight game winning run by Munster against the Welsh regions.
By the time the game kicks off in the Liberty Stadium on Saturday evening, Leinster are likely to be the new League leaders, unless of course the Blues have pulled off a shock win at the RDS the previous afternoon.