Antonio Mattei Lluberas[note 1] (September 7, 1857 – January 15, 1908), was a businessman and politician who in 1897 planned and led the second and last major uprising against Spanish colonial rule in Puerto Rico, known as the Intentona de Yauco.

On December of that year, the local Civil Guard discovered their plans and proceeded to arrest all those involved who, besides Mercado and Mattei Lluberas, included Dario and Carlos Franchesi and Emiliano Lavergue, however they were soon released and returned to their respective homes.

There he met with Ramon Emeterio Betances, Juan de Mata Terreforte and Aurelio Méndez Martinez and together they proceeded to plan a major coup.

Fellow rebels, Gerardo Forest Velez and Agustin F. Morales (himself a general in the Army of the Dominican Republic), were in charge of propaganda and traveled throughout the island seeking public support for their cause.

[4] The Mayor of Yauco Francisco Lluch Barreras heard the rumors of the planned uprising, he immediately notified General Sabas Marín González the governor of the island.

In the discussion that followed, the other leaders did not agree with him, fearing that such a haste action would lead to the same disastrous results of El Grito de Lares.

They planned to attack the barracks of the Spanish Civil Guard with the aim of gaining control of the arms and ammunition which were stored there.

[8][9] On July 31, 1898, Mattei Lluberas and his group arrived in Ponce aboard the USS St. Louis and were assigned to the headquarters of General Miles.