Matthew Grau (born December 13th, 2004), better known by his stage name Mat… Read Full Bio ↴Matthew Grau (born December 13th, 2004), better known by his stage name Matt Ox, is a rapper and producer hailing from Philadelphia, Pennsylvania. His song "Overwhelming" blew him up in 2017. He has continued to release more music, including his debut album, OX, which was released on October 30th, 2018 and includes features from the likes of Chief Keef, Key!, and Valee.

In March 2018, he was featured on the song "$$$" from XXXTENTACION's album ?. He has cited artists such as Eminem, Marilyn Manson, Soulja Boy, and Lil B as influential to his musical style. On his song "PSYCHE" he rapped on 20 different beats.

For the entire month of January 2022, Matt released a song every day leading up to the official release of his mixtape YEAR OF THE OX.