He was part of the Ireland under - 20 team for the 2013 season , making his debut against Wales in the 2013 Six Nations Under 20s Championship .
Crosbie has represented Ireland internationally at under - age level .
Crosbie was part of the Ireland under - 20 team for the 2013 season , making Crosbie 's debut against Wales in the 2013 Six Nations Under 20s Championship .
Crosbie has represented Ireland internationally at under - age level .