The 2020-21 campaign delivered a triumphant promotion for Rayo Vallecano, as the Rayistas, under the astute guidance of manager Andoni Iraola, battled to a 6th-place finish in the Segunda División before clinching their return to La Liga via the thrilling promotion play-offs. Leading the charge was the prolific forward Isaac Palazón Camacho, whose 9 league goals proved decisive in a season built on the team's characteristic grit and determination, culminating in a dramatic final play-off victory against Girona. It was a defining, unforgettable year that secured the working-class club's top-flight status and remains a proud chapter in the history of Los Franjirrojos.