Humberto Salvador Mercado-Luján (born 25 March 1969) is a retired Mexican football midfielder who played professionally in Mexico and the United States.
In the summer of 1994, Mercado spent the Mexican off-season with the El Paso Patriots of the USISL.
In 1995, he went on loan to El Paso which finished runner-up to the Richmond Kickers in the 1995 U.S. Open Cup final.
He was out for most of the season due to an injury, but played a handful of games as the Chivas won the Torneo Verano.
In 2000, Mercado began the season with Atlético Celaya, but finished it with Ciudad Juarez.