Joël Zwarts has begun training with CSKA Sofia in Austria, and the club from Borisova Gradina published photos from the 27-year-old Dutch and Surinamese forward's first session. CSKA also mentioned that the player received a special welcome. The former Lokomotiv Plovdiv player, who is the first summer signing for Hristo Yanev's team, had earlier greeted the fans in a video. Zwarts joined his former club in February 2026, scoring 8 goals and providing 3 assists in 15 efbet Liga appearances in the 2025/2026 season. The forward has 2 caps for the Netherlands U19 team. According to Transfermarkt, his current market value is €500k.