Rayo Vallecano de Madrid, S.A.D. (Spanish pronunciation:, often abbreviated to Rayo, is a Spanish football team based in Madrid, in the neighbourhood of Vallecas. Rayo was founded on 29 May 1924, and currently compete in La Liga following promotion from the Segunda División. Home games are held at the 14,708-seater Campo de Fútbol de Vallecas stadium.
Rayo has competed in one European competition, the UEFA Cup in the 2000–01 season. The club made it to the quarter-finals before losing to Spanish club Alavés 4–2 on aggregate. Source: Wikipedia