In the summer of 2015, another wing of the club split up from AS Progresul, the new entity called CS Progresul 2005 chose to start his own way, but the heavy blow was given by fans, which chose to support Progresul Spartac instead of AS Progresul. Despite the tough situation, AS Progresul made another good season and qualified for the Bucharest series promotion play-off, where it had a tough duel against Progresul Spartac București, the club that chose to separate in 2014. The matches between the two clubs took place both on the ground, in the committees and in the press, accusing each other of various irregularities. At the end of the play-off AS Progresul was ranked second, Progresul Spartac won and qualified for the Liga III promotion play-off where after a spectacular 6–5 on aggregate (but not without problems) against Voința Crevedia, promoted to Liga III.
