Hernandez cleared waivers and was outrighted to the Royals' alternate training site Wednesday.
The 27-year-old was designated for assigment over the weekend and will remain in the organization after going unclaimed on waivers. Hernandez will continue to provide catching depth in the 60-man pool, but he's unlikely to rejoin the roster if Salvador Perez, Cam Gallagher and Meibrys Viloria remain healthy.