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 remained inactive during 1975. In 1976, he announced a comeback and stated his intention of securing a rematch with Ali. His first opponent was to be Ron Lyle, who had been defeated by Muhammad Ali in 1975, via 11-th round TKO. At the end of the first round, Lyle landed a hard right that sent Foreman staggering across the ring. In the second round, Foreman pounded Lyle against the ropes and might have scored a KO, but due to a timekeeping error the bell rang with a minute still remaining in the round and Lyle survived. In the third, Foreman