[citation needed] O'Connor joined the St Martin's club at a young age and played in all grades at juvenile and underage levels as a dual player.
He experienced championship success in the under-21 grade before joining the club's top adult teams as a dual player.
On 22 October 2017, O'Connor lined out at left wing-forward when St Martin's qualified for the Wexford Hurling Championship final.
[3] On 29 October 2017, St Martin's had the chance to achieve the double when they faced Starlights in the Wexford Football Championship final.
[7] On 9 July 2014, O'Connor won a Leinster Championship medal when he again lined out at left wing-back in Wexford's 1-20 to 0-18 defeat of Dublin in the final.
[9] On 8 July 2015, O'Connor won a second successive Leinster Championship after scoring a point from left wing-back in Wexford's 4-17 to 1-09 defeat of Kilkenny in the final.
[10] He retained his position at left wing-back for the All-Ireland final against Limerick on 12 September 2015, however, he ended on the losing side for the second year in succession following a 0-26 to 1-07 defeat.