Bronco safeties limited, runningSTANFORD, Calif. — The Denver Broncos began final preparations for Super Bowl 50 with their two rehabbing starting safeties limited but running freely on the natural grass inside Stanford Stadium.T.J. Ward only slightly favored his sprained left ankle, and Darian Stewart appeared to be running well on his sprained right knee and without restriction.Over at San Jose State University, linebacker Thomas Davis was a full participant at the Panthers’ practice on grass fields adjacent to Spartan Stadium a little more than a week removed from surgery on his broken right forearm.

‘No credible threat’ to Super Bowl 50SAN FRANCISCO — NFL security leaders and top law enforcement officials say there is “no credible threat” to Super Bowl 50.Jeffrey Miller, NFL senior vice president of security, planned to walk the perimeter of Levi’s Stadium again and he estimates it’s approximately three to four miles around the facility in Santa Clara where Sunday’s Super Bowl will be played between Carolina and Denver. Miller said he is satisfied with the collaborative effort between local, state and federal law enforcement agencies to handle any possible issues, including terrorism of any kind.

Prostitution sting costs Denver playerSANTA CLARA, Calif. — Broncos coach Gary Kubiak says he’s disappointed he had to send home one of his practice squad players who was caught up in a prostitution sting a few miles from the team hotel.The Broncos sent safety Ryan Murphy home after he was questioned by authorities during a sting in San Jose on Tuesday. Santa Clara County Sheriff’s Sgt. James Jensen said Murphy, 23, was detained and questioned Tuesday and released after investigators determined he was not involved in any criminal activities. The Broncos sent him back to Denver anyway because they said it would be best for the team to prepare for Super Bowl 50 without him.

Raider QB Stabler diagnosed with CTEBOSTON — Former Oakland Raiders quarterback Ken Stabler, the late NFL MVP and Super Bowl winner who is a finalist for the Pro Football Hall of Fame, has been diagnosed with the brain disease CTE, Boston University researchers said Wednesday.Stabler, who died of colon cancer at 69 in July, had Stage 3 chronic traumatic encephalopathy, Dr. Ann McKee told The Associated Press.