The club marked its centenary in 1990 with a number of special matches and entered a new era by signing a sponsorship agreement with Scottish Amicable, an association that continued for 12 years.

The Centenary Dinner was held in London, prior to a match against England at Twickenham, and brought together nearly 700 old Baa-Baas from around the world to meet old friends and discuss the game of rugby football. The following Saturday they met Wales at Cardiff Arms Park – scene of so many great moments for the Barbarian club – and a match for which Wales awarded caps – a signal honour to the Barbarians.

Each of the traditional fixtures, against Newport, Leicester, the East Midlands, Cardiff and Swansea, had a special atmosphere that season and the club included a return to its founding city for a match against Bradford. The celebrations were only brought to a close with a 16-all draw against Scotland at Murrayfield in September 1991, with the match being preceded the night before by a special Centenary dinner for all the Scottish Barbarians who had provided so many players for the club over the years.