Juan Habisail Diaz (born December 12, 1988) is a Dominican former professional baseball shortstop.

He signed as a non-drafted free agent on April 20, 2006 by Seattle Mariners an played in Major League Baseball (MLB) for the Cleveland Indians in 2012.

In 2006, his first professional season, Díaz batted .191 in 178 at-bats for the Dominican Summer League Mariners.

Díaz began the 2007 season with the Class-A High Desert Mavericks appearing in six games.

On June 26, 2010 Diaz was traded to the Cleveland Indians along with Ezequiel Carrera for Russell Branyan.

[4] On June 4, 2013, Diaz was called up from the Triple-A Columbus Clippers to fill in for All-Star shortstop Asdrúbal Cabrera who had been put on the 15-day DL earlier that day.