Career
O'Reilly was part of the Down senior team in 2009. He has also played Australian rules football for the Richmond Football Club in the Australian Football League (AFL). O'Reilly was drafted to Richmond from Loughinisland in the Down Senior Football Championship in Ireland with the 70th selection in the 2010 Rookie Draft.
O'Reilly was the Tigers' first ever "International selection". He made his senior AFL debut in 2010. In 2011, O'Reilly ended contract renewal negotiations with the Tigers, announcing his intention to instead return to Ireland and
He came on in Down Ulster Senior Football Championship defeat to Fermanagh he came on the qualifier game.
Loughinisland made the 2009 County Final where they played Kilcoo. It was a good game they led at half time 1-04 to 0-03 but a strong second half display by Kilcoo gave them the title winning 2-09 to 1-04.