Mezue ahịrịokwu na-esonụ: O'Donnell ka a na-emechi maka Ireland na U-18 na U-20 ọkwa. Ọ bụ onye otu U-20 meriri Grand Slam n'afọ 2007. Ọ natara oku izizi ya na 21 Jenụwarị 2013, mgbe a kpọrọ ya n'ime ndị agha nke Ireland.
2013 Six Nations Championship ọzụzụ squad. O'Donnell mere mbido ya maka Ireland Wolfhounds na 25 Jenụwarị 2013, na-amalite na enyi na enyi megide England Saxons. A gbakwunyere ya na ndị otu mba isii nke Ireland maka egwuregwu megide Scotland na 18 February 2013.