On 24 February 2013, McGrath top scored with 0-05 for the team when they suffered a 2–21 to 1–11 defeat by Dungarvan Colleges in the Harty Cup final.
On 1 March 2015, he was selected at right wing-forward when UL faced the Waterford Institute of Technology in the Fitzgibbon Cup final.
He was selected at right corner-forward but spent much of the game at centre-forward and scored 2–07 in the 1–30 to 3–22 defeat by Mary Immaculate College.
[4] On 24 February 2018, McGrath lined out in a third Fitzgibbon Cup final when UL faced DCU Dóchas Éireann.
On 13 October 2013, McGrath lined out at right wing-forward against Nenagh Éire Óg in his first Tipperary Hurling Championship final.
McGrath was just 15-years-old when he was selected for the Tipperary minor hurling team prior to the start of the 2010 Munster Championship.
On 3 July, he was an unused substitute with the Tipperary minor football team when they defeated Cork by 3–11 to 1–09 to win the Munster Championship.
On 8 July 2012, he won a second successive Munster Championship with the Tipperary minor football team after coming on as a 55th-minute substitute in the 2–14 to 1–14 defeat of Kerry in the final.
[16] On 15 July 2012, McGrath lined out at midfield when the Tipperary minor hurling team faced Clare in the Munster final.
[20] McGrath was once again introduced as a substitute when Tipperary suffered a 1–17 to 2–10 defeat by Clare in the Munster final on 7 August 2013.
An injury ruled him out of the Munster final with the footballers against Cork on 9 April 2015, however, he claimed a winners' medal as an unused substitute following the 1–15 to 3–08 victory.
[25] A chronic groin injury meant that McGrath was an unused substitute for Tipperary in the subsequent Championship.
Switched from corner-forward and lining out at left wing-forward, he scored 0-02 from play but ended on the losing side following a 2–23 to 2–17 defeat by Kilkenny.
[33] On 18 August 2019, McGrath was selected at left corner-forward when Tipperary faced Kilkenny in the All-Ireland final.
His brother, Noel McGrath, is a three-time All-Ireland medalist and a current teammate on the Tipperary senior team.