Byrne first came to prominence as a hurler with Nenagh CBS. He played in all grades before joining the school's senior team and made several appearances in the Dr. Harty Cup.[1]
Byrne first lined out for Tipperary as a member of the minor team during the 2015 Munster Championship. On 12 July, he was an unused substitute when Tipperary defeated Limerick by 0-20 to 0-17 in the Munster Championship final.[3] Byrne was again an unused substitute on 6 September when Tipperary suffered a 4-13 to 1-16 defeat by Galway in the All-Ireland final.[4]
Byrne made his first appearance for the Tipperary under-21 team on 22 June 2017. He lined out at right wing-back in Tipperary's 2-24 to 0-19 defeat by Limerick in the Munster Championship.[5]
On 26 August 2018, Byrne was at centre-back when Tipperary faced Cork in the All-Ireland final. He ended the game as man of the match following a 3-13 to 1-16 victory for Tipperary.[6] Morris ended the year by being named in the centre-back position on the Team of the Year.[7]
Senior
Byrne made his first appearance for the Tipperary senior team on 26 January 2019. He scored a point from midfield in Tipperary's 2-16 to 1-11 National League defeat of Clare.[8] He made his Munster Championship debut on 19 May 2019 when he came on as a second-half substitute in the 2-30 to 0-18 defeat of Waterford.[9] On 30 June 2019, Byrne was an unused substitute when Tipperary suffered a 2-26 to 2-14 defeat by Limerick in the Munster final.[10] On 18 August 2019, he was again amongst the substitutes when Tipperary faced Kilkenny in the All-Ireland final. Byrne remained on the bench throughout but ended the game with an All-Ireland medal following the 3-25 to 0-20 victory.[11]