Career
Díaz signed with the Pittsburgh Pirates as an international free agent in 2008. He made his professional debut in 2009 for the Venezuelan Summer League Pirates. From 2010 to 2013, he played for the Gulf Coast Pirates, West Virginia Power and Bradenton Marauders.
Díaz started 2014 with the Double-A Altoona Curve.
In August he was promoted to the Triple-A Indianapolis Indians after hitting.328 with Altoona. On November 20, 2014 Díaz was placed on the Pirates" 40-man roster.