[2] As well as rugby, Campbell was also a very talented Gaelic footballer for Nemo Rangers and, in 2019, he was a crucial part of the Cork team that won the All-Ireland Minor Football Championship, with Campbell scoring 1–2 and earning the player of the match award in the semi-final against Mayo and scoring 0–1 in the final against Galway.
[1] Additionally, Campbell chose to pursue rugby over football, and joined Young Munster ahead of the 2021–22 All-Ireland League, quickly impressing in a series of strong performances for the Limerick club.
[7] He featured off the bench in Munster's historic 28–14 win against a South Africa XV in Páirc Uí Chaoimh on 10 November 2022.
[8] Having featured in the warm-up games against Munster and Leinster development sides,[9][10] Campbell was selected in the Ireland under-20s squad for the 2022 Six Nations Under 20s Championship when it was announced in January 2022.
[11] He made his competitive debut for the under-20s in their tournament-opening 53–5 win against Wales on 4 February, though Campbell had to leave the field due to an injury during the first-half.