21-year-old Pacheco has already won two victories in the pro ring this year, and the last time he boxed was in June. Collazo hasn't fought since losing to José Miguel Torres last year.
On the same evening, a fight will take place between the WBC world champion in the second flyweight champion Jess Rodriguez (16-0, 11 KOs) and Israel Gonzalez (28-4-1, 11 KOs). For 22-year-old Rodriguez, this will be his third appearance in the ring this year. The American defeated Carlos Cuadras and Srisaket Sor Rungvisai in his last two fights. "Bam" recently renewed his contract with Matchroom Boxing.
The main event of the September evening in Las Vegas will be the third fight between Saul Alvarez and Gennady Golovkin for four super middleweight championship belts. Fans will also see a fight for the belt of the WBA international middleweight champion between Austin Williams (11-0, 9 KOs) and Kieron Conway (17-2-1, 3 KOs).