For the 2021 season, the FAM added the Rarámuris de Ciudad Juárez ("Juárez Raramuris") and the Tiburones de Cancún ("Cancún Sharks"), while the "Centauros" withdrew from the league. In February it was announced that former NFL first round draft pick Trent Richardson signed with the "Caudillos de Chihuahua". When asked of his role on the team Richardson said: "I might play. I might be a part of making decisions or helping out bringing awareness or I might be a part of D – all of the above. So we’ll see."