Cuban connection
In 1999, the club drew a lot of attention when then owner Hans-Robert Viol signed the complete Cuba national football team for the remainder of the season with the approval of Cuban leader Fidel Castro, who ordered the players to remain amateurs and only be paid pocket money.[1] They were the first 15 Cuban football players to have a spell abroad during the Castro regime and only four of them were expected to play in the Germans fourth tier side.[2]
In 2000–01, they fell as low as Verbandsliga Mittelrhein (V). Despite the drought of success, Bonner SC were able to muster-up a phenomenal season in the NRW-Liga in the 2008–09 season and become champions leading to their promotion back to the Regionalliga for the 2009–10 Season.
The club had to declare insolvency in July 2010 and was therefore unable to enter the Regionalliga. The team, 7 million euros in debt, was also barred from entering the NRW-Liga as it could not provide the necessary guarantees to prove it would be able to survive financially. Having declared insolvency after the start of the new season, the side could only enter the league below, the Mittelrheinliga, under the condition of being automatically relegated at the end of season, which it declined and paused for a year. Bonner SC entered the tier seven Landesliga Mittelrhein 1 for the 2011–12 season.[3]
From 2014 to 2016 Bonner SC played in the fifth tier of the league system, the Mittelrheinliga. In the 2015–16 season the club won the league and earned promotion to Regionalliga West. In 2021 they got relegated back to the Mittelrheinliga. They got promoted in 2025.
