The Mob is a New York hardcore band formed in 1980. The band began when Jack Flanagan left the group Heart Attack to form his own group with Ralph Gebbia, John Frawley, and Nicko. After being exposed to hardcore through a Bad Brains show at CBGB, the group started playing harder and faster, moving away from the sound of the first wave of New York City punk rock bands. In 1981, Jose Gonzalez officially joined the group, following John Frawley's departure to join Heart Attack, and Jamie Shanahan replaced Nicko on drums. With Gonzalez, the Mob released two iconic hardcore singles, "Upset the System" and "Step Forward".