Career
Oliveras played seven seasons in the minor leagues. He was also a coach in the Major Leagues for the California Angels and the Chicago Cubs. In May 1986, Oliveras took over as skipper of the independent Miami Marlins after Fred Hatfield was fired.
The next year, Oliveras was hired by the California Angels organization and hmanaged the Midland Angels from 1987 to 1989.
He moved up to Triple-A, managing the Edmonton Trappers from 1990 to 1992 and the Vancouver Canadians in 1993. In 1998, he managed the Kinston Indians.
He took over as skipper of the Orlando Rays in 2002, then moved down to the Charleston RiverDogs in 2003, and then back up to the Bakersfield Blaze in 2004. In 2005 and 2006, he was a coach for the Montgomery Biscuits under manager Charlie Montoyo.
He later managed the Binghamton Mets from 2007 to 2009.
In between, Oliveras played for the Petroleros de Poza Rica of the Mexican League and piloted the Cangrejeros de Santurce club to Caribbean Series championships in the 1993 and 2000 tournaments.