 On 2 July 2015, he made his first appearance for the team when he came on as a late substitute in Limerick's 1-14 to 0-14 Munster Championship defeat of Cork.O'Reilly subsequently joined the Limerick under-21 hurling team in 2016 and played during the team's unsuccessful championship campaign.He was included on the panel again the following season and won a Munster Championship medal after a 0-16 to 1-11 defeat of Cork in the final.