Ayutthaya FC

Bang Pa-in stayed in Division 1 from 2013 to 2015, finished seventeenth in that last season and dropped back down. The years that followed took the club through the lower reaches of the Thai game and through a series of homes — the Rajamangala University of Technology's Hantra Campus ground among them — before it settled at the Bang Pa-in District Stadium. That move coincided with a change of identity: in 2020 the club dropped the old Ayutthaya FC name for Bang Pa-in Ayutthaya F.C., and with it went the old nickname, the Ancient Warriors, replaced by the Blue Warriors to match the all-blue kit. Relegation from the third tier followed, and the club has played in the Thailand Amateur League since the 2021–22 season.

No major cup has come the club's way, and the closest thing to a rivalry, an "Ayutthaya Showdown" against Ayutthaya United, has never carried the weight of a proper derby.