US citizen born in Ireland, McCusker played for the Rainey Old Boys and Ulster U20s.
A workhorse at lock, Ronan played 3 years of inter-provincial rugby for Ulster and received an All Ireland League promotion.
In early 2019, he made an impact when he spent time with Austin Elite in the MLR on loan from the Free Jacks. Ronan played the fall season of 2019 with Mystic River before joining the Free Jacks.
He played with three games with Austin Elite, and made just one appearance for the Free Jacks before the 2020 season was suspended.
In August 2021, he signed for Championship side, Doncaster Knights.
(LS August 30, 2021)
Career
 |
Austin Gilgronis Rugby No 4 Lock |
2019 - 2019 |
 |
New England Free Jacks No 4 Lock |
2019 - 2021 |
 |
Doncaster Knights No 4 Lock |
2021 - 2023 |
