Date of birth
Republic of Ireland
A look at the defender's early career.
Rian O’Sullivan has progressed into Simon Rusk’s under-23 setup since moving to the club from Ireland in 2015 - as he signed his first professional contract the following year.
The young Irishman has spent time on loan with Sussex club Worthing during the 2017/18 season, gaining experience further down the non-league pyramid.