Raiders coach Lane Kiffin finally spoke to Walker by phone on Wednesday morning, more than two days after Walker was discovered unconscious and beaten on a back street near the Las Vegas Strip following a night of partying. Walker was released from a hospital after treatment for a concussion and facial injuries.
"The info that I have is he's going to be fine," Kiffin said. "Training camp won't be an issue. ... But until our guys look at him, I don't want to say (the extent of Walker's injuries)."
Oakland opens training camp July 25.
FALCONS: Signed sixth-round draft pick Thomas Brown , a running back from the University of Georgia.
He will compete for playing time behind Michael Turner and Jerious Norwood at running back while also playing on special teams. He returned kickoffs during his first minicamp.
Brown is fifth on Georgia's career records with 2,646 yards rushing and fourth with 3,767 all-purpose yards.
BENGALS: Wide receiver Chad Johnson is expected to be fully recovered from ankle surgery for training camp next month.
Johnson had his troublesome right ankle cleaned out Wednesday. He is expected to be ready for the start of training camp on July 27.
CARDINALS: Running back J.J. Arrington was among five people arrested after a fight at a nightclub in North Carolina.
Police in Rocky Mount said an off-duty officer called for assistance around 1:30 a.m. Wednesday at the D&I Center nightclub. The 25-year-old Arrington was charged with disorderly conduct.
TITANS: Linebacker Ryan Fowler denied Wednesday he had taken performance-enhancing drugs, less than two weeks after his lawyer said Fowler received a letter from the NFL saying he was under investigation.