Juan José Ubaldo Cabrera (born April 30, 1979 in Santo Domingo, Distrito Nacional) is a boxer from the Dominican Republic best known to win the PanAm title at middleweight as an amateur.

At the Sydney Olympics 2000 he lost in the first round to local hero Richard Rowles.

Ubaldo won Light Middleweight silver at the 2002 Central American Games losing to Juan Camilo Novoa.

He added the gold medal at middleweight 2003, at the Pan American Games in Santo Domingo.

There he was stopped in the first round of the Middleweight (75 kg) division by Cameroon's Hassan Ndam Njikam.