Humberto Garza Carrillo is a Mexican professional wrestler signed with WWE. He is currently assigned to SmackDown. He is a former WWE Cruiserweight Champion.
In December, he began his wrestling career as Último Ninja. Carrillo spent years wrestling at independent promotions such as Casanova Pro, Nueva Generacion Xtrema, Lucha Libre Del Norte, Lucha Libre Azteca, The Crash Lucha Libre, Chilanga Mask, Empresa Regiomontana de Lucha Libre, RIOT Wrestling Alliance, and Promociones MDA.
In 2018, Carrillo signed with WWE and began working for 205 Live. Carrillo began working for NXT and 205 Live simultaneously. He spent a year chasing the WWE Cruiserweight Championship but failed to win. At Elimination Chamber, Carrillo lost to Buddy Murphy for the WWE Cruiserweight Championship.
In 2019, they moved Carrillo to RAW. In October, he faced Seth Rollins in a losing effort. In December, he began feuding with Andrade for the United States Championship. He faced Andrade at Royal Rumble and Elimination Chamber but was unsuccessful. After Andrade, he began feuding with his real-life cousin Angel Garza.
In 2020, he mostly faced Andrade, Angel Garza, Seth Rollins, AJ Styles, Murphy, and Austin Theory. He spent the final few months on Main Event. In 2021, Carrillo turned heel and joined Angel Garza. They formed a tag team called Los Lotharios. During the Draft, they were drafted to SmackDown. Los Lotharios were last seen facing Viking Raiders.