Delson graduated from Agoura High School in 1995 and formed Xero with Mike Shinoda whom he knew since the seventh grade, which would later become Linkin Park. He graduated from the University of California, Los Angeles with a degree in communications, but decided to forget law school to pursue a career with Linkin Park. He also used to work as a bouncer at the Roxy, as confirmed by the breakfast with Linkin Park hosted by Kevin and Bean, which can be heard KROQ.com.