O'Loughlin played in a second successive Fitzgibbon Cup final on 12 February 2020. Captaining the team from centre-back, he ended the game with a second successive winners' medal after the 0–18 to 2–11 defeat of the Institute of Technology, Carlow.[3]
Kilmallock
O'Loughlin joined the Kilmallock club at a young age and played in all grades at juvenile and underage levels, before joining the club's senior team.
O'Loughlin first played for Limerick at minor level. On 22 July 2014, he was at full-back when Limerick won their second successive Munster Championship title after a 0–24 to 0–18 defeat of Waterford in the final.[7] On 7 September 2014, O'Loughlin was again at full-back in Limerick's 2–17 to 0–19 defeat by Kilkenny in the All-Ireland final.[8]
O'Loughlin's second and final season with the Limerick minor hurling team ended with an All-Ireland quarter-final defeat by Galway.[9]
O'Loughlin joined the Limerick under-21 team in 2016 but was an unused substitute for Limerick's unsuccessful championship campaign. After being dropped from the panel the following year, O'Loughlin made his first appearance for the team on 7 May 2018 in a 3–18 to 0-13 Munster Championship defeat of Clare.[10]
Senior
In November 2017, O'Loughlin was added to the Limerick senior hurling panel and made his first appearance for the team during the pre-season Munster League.[11] He made his first appearance in the National Hurling League on 28 January 2018 in a 1–25 to 0–18 defeat of Laois.[12] On 19 August 2018, O'Loughlin was a member of the extended panel when Limerick won their first All-Ireland title in 45 years after a 3–16 to 2–18 defeat of Galway in the final.[13]
On 31 March 2019, O'Loughlin was named on the bench for Limerick's National League final meeting with Waterford at Croke Park. He collected a winners' medal as a non-playing substitute in the 1–24 to 0–19 victory.[14] O'Loughlin made his Munster Championship debut on 2 June 2019 when he lined out at left wing-back in a 2–24 to 0–10 defeat of Waterford.[15][16] On 30 June 2019, O'Loughlin won a Munster Championship medal as a non-playing substitute following Limerick's 2–26 to 2–14 defeat of Tipperary in the final.[17]