Dan Leavy is to retire from rugby with immediate effect.
The 27 year old Leinster and Ireland back row forward suffered a serious knee injury in March 2019 and has been advised to retire on medical grounds.
Leavy made 79 appearances for Leinster since his debut in October 2014 and was a key part of the Champions Cup winning side of 2018.
He was also capped 11 times for Ireland and won the Grand Slam at Twickenham in 2018.
Meanwhile Munster are suffering an injury crisis ahead of Saturday's Heineken Champions Cup last 16 first leg away to Exeter.
Tadhg Beirne, Dave Kilcoyne and Gavin Coombes have joined Andrew Conway in the treatment room.
Beirne needs to see a specialist about a thigh injury, while Kilcoyne is rehabbing a neck injury.
Coombes misses the Sandy Park trip with an ankle problem.