Héctor Lavoe a guest singer with the Fania All-Stars for several shows. One of the group's notable performances took place in the Kinshasa province of the Zaire (modern day Democratic Republic of Congo) where the group performed as part of the activities promoting The Rumble in the Jungle, a boxing fight between Muhammad Ali and George Foreman for the heavyweight championships of the World Boxing Council and World Boxing Association. The Fania All Stars recorded several of their tracks during live concerts. Lavoe was part of the group when the All-Stars returned to Yankee Stadium in 1975, where the band recorded a
Muhammad Ali Pancrase in 1993, which in turn inspired the foundation of Pride Fighting Championships in 1997. Pride was acquired by its rival, Ultimate Fighting Championship, in 2007. The Muhammad Ali Boxing Reform Act was introduced in 1999 and passed in 2000, to protect the rights and welfare of boxers in the United States. In May 2016, a bill was introduced to United States Congress by Markwayne Mullin, a politician and former MMA fighter, to extend the Ali Act to mixed martial arts. In June 2016, US senator Rand Paul proposed an amendment to the US draft laws named after Ali, a