Jairo Jose Díaz Hernandaz (born May 27, 1991) is a Venezuelan former professional baseball pitcher.

[2] On December 11, 2024, the Angels traded Díaz to the Colorado Rockies in exchange for Josh Rutledge.

During spring training in 2016, Díaz tore a ligament in his right elbow that would require Tommy John surgery.

[12] On June 7, it was announced that Díaz's deal with the Mariners had never been finalized, and that he was signing with an independent team.

[13] On June 7, 2022, Díaz signed with the Gastonia Honey Hunters of the Atlantic League of Professional Baseball.