Danielito Zorrilla (17-1, 13 KOs) will face Regis Prograis (28-1, 24 KOs) in the fight for the WBC super lightweight title, which will be the main event of the Matchroom Boxing evening, organized on June 17 in New Orleans.
Prograis, 34, won the World Boxing Council belt in November by stopping Jose Cepeda. Rugaru recently signed a contract with Eddie Hearn's stable.
Earlier, Liam Paro was supposed to fight the American, but the Australian was injured and had to withdraw from the fight. The last time Zorro fought was in March.