XEFZ-AM is a radio station on 660 AM in Monterrey, Nuevo León.

It is owned by Grupo Radio Alegría and carries a sports talk format known as ABC Deportes.

Not long after, XEFZ moved to 660 and ramped up its power to 10,000 watts.

At the same time, XHGBO-FM 92.1 was switched to simulcasting the new sports talk format from carrying sister station XEBJB-AM 570.

This article about a radio station in Nuevo León is a stub.