Joseph Diaz Jr./Photo courtesy of Golden Boy Promotions

Golden Boy Promotions on Thursday announced that featherweight Joseph Diaz Jr., a 2012 U.S. Olympian from South El Monte, has been added to the July 11 card at the Los Angeles Sports Arena (on HBO Latino).

Diaz, 22, is 16-0 with 10 knockouts. His opponent has yet to be determined.

Hank Lundy will take on Mauricio Herrera (21-5, 7 KOs) of Riverside in the junior welterweight main event. Lundy, of Philadelphia, is 25-4-1 with 12 knockouts.