Joseph Diaz Jr./Photo courtesy of Golden Boy Promotions

When Golden Boy Promotions announced Wednesday that junior welterweight Antonio Orozco of San Diego and featherweight Joseph Diaz Jr. of South El Monte would co-headline its July 30 card at Fantasy Springs Casino in Indio, Golden Boy had yet to secure an opponent for Diaz.

That has changed as Golden Boy has lined up Victor Proa of Mexico as Diaz’s foe for this card that will be televised by HBO Latino.

Proa, 31, is 28-1-2 with 21 knockouts. But that is very misleading because Proa’s ring record is comprised mostly of tomato cans. In Proa’s most recent bout, he took on Oswaldo Oziel Delgado and Proa stopped Delgado in the first round. Delgado entered with a record of 0-4.

Diaz (20-0, 11 KOs) is ranked as high as No. 3 in the world by one organization.

Orozco (24-0, 16 KOs) will tangle with Abner Lopez (23-5, 19 KOs) of Tijuana. Orozco is ranked as high as No. 1, but as a junior welterweight.