Gruden, who is known best for his time with the silver-and-black, ditched those colors on Sunday and was seen in St. Joseph, Missouri, wearing Chiefs red. That’s because Gruden was at training camp where he watched the Raiders’ former rivals prepare to go for a third straight Super Bowl title.

The duo have also squared off as head coaches through the years with Gruden at the helm of the Oakland and Vegas Raiders and Tampa Bay Buccaneers, and Reid as the head coach of the Philadelphia Eagles and Chiefs. Gruden resigned from his latest head ...

Jon Gruden has become known as somewhat of a chameleon over the years. Seemingly changing his stripes depending on his company. And certainly behaving differently in the public eye than he did behind closed