Underboss (also capo bastone or sotto capo) is a position within the leadership structure of Sicilian and American Mafia crime families. The underboss is second in command to the boss. The underboss is sometimes a family member, such as a son, who will take over the family if the boss is sick, killed, or sent to prison.

The power of an underboss greatly varies; some are marginal figures, while others are the most powerful individuals in the family. Traditionally they run day to day affairs of the family. In some crime families, the appointment is for life. If a new boss takes over a family with an existing underboss, that boss may marginalize or even murder him. On other hand, if a boss receives a prison term, the underboss may become acting boss. As bosses often serve large periods of time in prison, an acting boss will often become the effective boss. Even with the boss free, sometimes the underboss will gain enough power to become the effective head of the organization, and the boss will become a figurehead. An underboss likely has incriminating information about the boss, and so bosses often appoint people close to them to the underboss position for protection.

Philip "Crazy Phil" Leonetti (born March 27, 1953) is a Philadelphia gangster who became the underboss of the Scarfo crime family under his uncle, Nicodemo "Little Nicky" Scarfo before becoming a government informant. He was convicted of racketeering in 1988 and has admitted to participating in ten murders.

Tom Colontonio was born July 26^[when?] in New Jersey, US and is both an International trance producer , House Music producer and DJ.

He became a DJ in 1996 and a producer in 2005. His first public gig was at the legendary nightclub Studio 6 in Atlantic City. Colontonio is one of the most prominent DJs from the city of Philadelphia and won the prestigious award for "Trance dj of the year" (2005) in the Philadelphia City Paper, DJ Nights. He is responsible for releases on many world trance labels such as Armada Music, Vandit Records "The One", "Modern Day Madness", Discover Records, Spinnin' Records Doorn Records, Mondo and more. He was established in 2006 with the help of Irish Trance music producer John O'Callaghan Robert Stevenson (Activa), Sean Tyas and John Askew who all took interest in his early works. Colontonio's musical growth in the DJ world was rapid with the support of Artists such as Tiesto, Paul Van Dyk and Armin Van Buuren. He is responsible for remixing and collaborating with such artists as Paul Van Dyk, John O'Callaghan, Sean Tyas and Giuseppe Ottaviani.

Marcus Lakee Edwards (born March 29, 1976), better known by his stage name Lil' Keke, is a rapper from Houston, Texas and an original member of the Screwed Up Click.

Lil Keke gained national underground love with his track "Southside" from his 1998 release "Don't Mess Wit Texas". In 2005, Lil' Keke signed to Swishahouse Records. In an interview with HitQuarters at the time, label president and A&R T. Farris said, "He is a legend here in Houston. He plays a big role in the whole style of rap that we make down here." Lil' Keke started out working alongside DJ Screw doing mixtapes.