In the season 1992/93 the First XV, captained by Mervyn Feely, coached by Donal Spring, and with former All Black scrum half Bruce Deans making a significant contribution, won the Leinster League.
In the 2006/07 season Old Belvedere led by Scott "The Scott" Hutton took the Leinster Senior Cup and in a year of years went on to win Division 2 and promotion to division one.