The underboss (also known as sotto capo or capo bastone) is the second most important position in a crime family, directly beneath the Don himself. The underboss is usually appointed by the boss himself. The underboss is in charge of all of the capos and is usually first in line to become acting boss if the boss is imprisoned, while also frequently seen as a logical successor.

Notable underbosses

Corleone

• Santino Corleone
• Fredo Corleone
• Nick Geraci
• Albert Neri

Barzini

• Ettore Barzini

Tattaglia

• John Tattaglia

Cuneo

• Leo Cuneo

Stracci

• Mario Stracci

Molinari

• Nicodemo Molinari

Falcone

• Ignazio Pignatelli