[2] O’Connor was also a member of the winning Irish team at the European Show Jumping Championships in 2017, where he placed third in the individual competition.

[citation needed] Riding Waterford Crystal, O'Connor placed first in the individual jumping competition, earning Ireland's only gold medal.

[5] The Federation Equestre Internationale (FEI) ruled that O'Connor must be stripped of his medal and he also received a three-month ban from competition.

[citation needed] The individual showjumping gold medal went to Brazilian Rodrigo Pessoa and the Irish team's seventh place was inherited by the Italians.

[9] O'Connor rode to seventh place with Kilkenny at the Tokyo 2020 Olympics (celebrated in 2021),[10] but withdrew after his horse suffered a nosebleed during their round.