On 6 December 2006, he scored 1-03 from midfield when Our Lady's Secondary School defeated De La Salle by 1-10 to 2-04 to win the Dean Ryan Cup.
[citation needed] On 21 October 2007, McGrath was just 16-years-old when he lined out at left wing-forward in the Tipperary Hurling Championship final.
[4] On 7 November 2010, McGrath lined out at left wing-forward when Loughmore–Castleiney faced Aherlow in the Tipperary Football Championship final.
[5] On 13 October 2013, McGrath lined out at midfield against Nenagh Éire Óg in the Tipperary Hurling Championship final.
[9] McGrath retained his position at midfield for the replay on 26 December 2014 and collected a second successive winners' medal following a 0-09 to 2-02 victory.
[13] On 3 September 2006, McGrath broke onto the starting fifteen and was named at midfield when Tipperary faced Galway in the All-Ireland final.
[14] On 8 July 2007, McGrath scored a point from midfield when Tipperary won the Munster Championship following an 0-18 to 1-11 defeat of Cork in the final.
On 13 July 2008, he scored five points from play when Tipperary suffered a 0-19 to 0-18 defeat by Cork in the Munster final.
On 28 July 2010, McGrath won a Munster Championship medal after lining out at midfield in Tipperary's 1-22 to 1-17 defeat of Clare in the final.
[21] On 3 May 2009, McGrath scored 1-05 from right corner-forward in Tipperary's 2-26 to 4-17 extra-time defeat by Kilkenny in the National League final.
[23] On 12 July 2009, McGrath started the Munster final at right corner-forward and ended the game with a winners' medal after scoring three points in the 4-14 to 2-16 defeat of Waterford.
[26] On 5 September 2010, McGrath was selected at right corner-forward when Tipperary qualified to play Kilkenny in a second successive All-Ireland final.
[30] On 15 July 2012, McGrath lined out at left corner-forward when Tipperary qualified to play Waterford in a second successive Munster final.
[38] On 16 August 2015, he received a standing ovation when he came on as a substitute in Tipperary's 0-26 to 3-16 defeat by Galway in the All-Ireland semi-final.
[40] McGrath claimed a fourth Munster Championship medal on 10 July 2016 after scoring a point from left wing-forward in a 5-19 to 0-13 defeat of Waterford in the final.
[43] On 30 June 2019, McGrath scored a point from midfield when Tipperary suffered a 2-26 to 2-14 defeat by Limerick in the Munster final.
[48] On 15 December 2016, McGrath was selected on the bench when Munster faced Leinster in the Railway Cup final.
He was introduced as a half-time substitute for Shane Bennett and claimed a Railway Cup medal following the 2-20 to 2-16 victory.