The Castilla y Leon Iberians is made up of the clubs from the Castile and León Rugby División de Honor, thus bringing together VRAC, El Salvador, and the University of Burgos (UBU) teams.

The Rugby Europe Super Cup competition features 8 teams or franchises in two groups or "conferences", which is played in a Round Robin format.

During 2021 the Western Conference included the Brussels Devils of Belgium, the Delta of the Netherlands, the Lusitanos of Portugal, and the Castilla y Leon Iberians.

The Iberians qualified for the semi-finals, losing to the Black Lion 43-40 at Avchala Stadium.

The Rugby Europe Super Cup 2022 saw the Iberians in the semi-finals losing again to the Black Lion 41-9.