Raiders safety Lonnie Johnson Jr. broke his right leg in Las Vegas' mock game on Saturday, a person with knowledge of the injury told The Associated Press.

The Raiders are down a safety in training camp. Lonnie Johnson Jr., who appeared locked into a training camp battle with Jamal Adams for a starting role with Las Vegas, collided with stud defensive end Maxx Crosby and broke his fibula on Saturday,

The Las Vegas Raiders suffered a significant injury during Sunday's training camp practice when safety Lonnie Johnson Jr. broke his fibula after colliding with teammate Maxx Crosby, according to ESPN.