For those that don't have Insider on ESPN here is the complete text the OP is referring to. Doesn't sound like they are report a rumor.
"Justin Wilcox left as defensive coordinator at Tennessee for Washington. Names such as Randy Shannon and Ron Zook were hot items in conjunction with the recently vacated position. Alabama's Sal Sunseri was believed to be the next in line.
In the end, Tennessee head coach Derek Dooley decided to go Green. Buddy Green.
"Sources close to the situation have informed me that Buddy Green has accepted the DC job at Tennessee," Pete Roussel of CoachingSearch.com reported.
Green leaves Navy for Rocky Top after a decade of service as the Midshipmen's defensive coordinator. Green is well versed in a 34 defensive front, the system he employed during his time at Annapolis. Whether or not he chooses to make the change at Tennessee, a traditional 43 defense in recent years, will be a major decision."