Kozakken Boys

Founded on 13 April 1932, it settled at Sportpark De Zwaaier, which holds 5,000 and includes 600 covered seats.

The breakthrough came in 2014–15, when Kozakken Boys won the Topklasse Saturday title and were crowned the Netherlands' top Saturday amateur side, earning promotion to the Tweede Divisie for the first time.

Cup football has its own rules, and Kozakken Boys have made the most of them against sides several tiers above. In 2018–19 they reached the Round of 16 of the KNVB Cup before losing to Vitesse, and in 2022–23 they beat that same Vitesse side on penalties after a 2–2 draw. Ajax have also crossed their path in the cup, drawing with them in 2007–08 before a heavier defeat in 2016–17.

Against SV Spakenburg, the fixture known as the Amateurklassieker, results carry more weight than the table suggests. The club has also sent players on to the Eredivisie, among them Ahmad Mendes Moreira, who moved to FC Groningen.

Relegation to the Derde Divisie in 2024 undid some of that progress, and it took until May 2025, with a 4–0 win over Noordwijk in the promotion play-offs, for Kozakken Boys to force their way back to the Tweede Divisie.