Drummer and founding member of the nümetal rap group Linkin Park.
He and the original incarnation of Linkin Park, Xero, struggled for a time before discovering Chester Bennington.
He liked to play the piano, although he never performed it for any Linkin Park songs.
His parents are named Patty and Gregory. He had a relationship with actress Vanessa Lee Evigan that lasted until 2007. He has a brother named Dave.
He founded Linkin Park with his friend Brad Delson.