 He first ran for office in 1975 for a seat on the City of Miami Commission, he lost.In 1976, he ran for the Florida House of Representatives, he lost.On November 2, 1982 Mr. Diaz-Silveira received 20,077 votes out of 49,041 votes in the Florida Senate race of District 34, against the incumbent Joe Gersten and in 1983, he ran for Mayor of the City of Miami, which he lost again.