Akhmedov, 27, will fight for the third time after losing to Carlos Gongora. Rosado lost his last two fights to Jaime Munguia and Shane Mosley Jr.
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).
On the same evening, WBC super flyweight champion Jesse Rodriguez (16-0, 11 KOs) will face Israel Gonzalez (28-4-1, 11 KOs). For 22-year-old Rodriguez, this will be his third appearance in the pro ring this year. The American defeated Carlos Cuadras and Srisaket Sor Rungvisai in his last two fights.