Raiders safety Lonnie Johnson Jr. has suffered a broken fibula and will get an MRI to determine if there is additional damage, a source told ESPN.

Raiders safety Lonnie Johnson Jr. sustained a broken fibula in his right leg during Saturday’s mock game at Allegiant Stadium, according to a person with knowledge of the situation. Johnson, 29, will undergo further testing to determine the full extent of the injury.

The cornerback and linebacker groups also continue to take shape at Pete Carroll's first training camp in Vegas.

While they did re-sign or extend players like Maxx Crosby, Malcolm Koonce and Adam Butler, they parted ways with notable defenders like Robert Spillane, Tre'Von Moehrig, Nate Hobbs and more. As a result,