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
George Foreman later charged that Angelo Dundee had loosened them, and this story is supported by Norman Mailer in the book "The Fight"), allowed Ali to lean back and away from Foreman's wild swings and then to clinch Foreman behind the head, forcing Foreman to expend much extra energy untangling himself. Ali also constantly pushed down on Foreman's neck but was never warned about doing so. To this day, it is unclear whether Ali's pre-fight talk of using speed and movement against Foreman had been just a diversionary tactic or whether his use of what became known as the "rope-a-dope" tactic was