Jack Del Rio has been back to Denver only once since being hired as Raiders head coach.
NFL teams have two weeks to apply the franchise and transition tag.
The Raiders are "expected to pursue" Broncos free-agent defensive tackle Terrance Knighton, according to a report from the Denver Post.
The fire that destroyed Cowboys linebacker Rolando McClain's home in December was an act of arson, authorities say.
Jack Del Rio has hired and fired Bill Musgrave before. The first time came in 2003, when Del Rio was named coach of the Jacksonville Jaguars.