Sexton is also a track sprinter, winning the 2018 and 2019 All-Ireland Schools Championships in both the 100m and 200m, representing Bangor Grammar School. In 2019 Sexton also broke the all-Ireland schools record in both events with times of 10.43 for the 100m and 20.69 for the 200m.[2][3]
Sexton represented and Ireland came 15th at the 2018 World u20 Athletics Championships in the 200m sprint, and was apart of the Irish 4x100m relay team who finished 11th. the following year Sexton finished 4th at the u20 European Championships in the 200m sprint.
Rugby Union
He played for Ulster "A" in the 2018–19 Celtic Cup, scoring seven tries in six games,[4] and was named Ulster "A" player of the Year in the 2019 Ulster Rugby Awards.[5] He joined the Ulster academy ahead of the 2019–20 season, committing himself full-time to rugby.[4] He made his senior debut as a replacement against Edinburgh in November 2020.[6][7] In January 2021 he signed a development contract, to be upgraded to a senior contract after one season.[8] He was selected for the Ireland national rugby sevens team for the World Rugby Sevens Repechage in Monaco in July 2021,[9] helping the team qualify for the Tokyo Olympics.[10] He made two senior appearances for Ulster in the 2021–22 season,[1] scoring a try against Cardiff in March 2022.[11] Sexton left the Province in December 2024 after making 10 appearances.