Came across a Don mention in my Google alerts that I figured pertains to this album. It's about a musician named Bryan Sutton.

Quote Originally Posted by Bryan Sutton in GroupState.com
When asked “Who have you recorded with recently?” Bryan Sutton says the names with the slight nonchalance of someone who belongs.

“I worked in studio with guys like Blake Shelton, Darius Rucker and Don Henley earlier this year,” he said without the giddiness of a rookie.
- http://www.goupstate.com/article/20140709/ENT/407101008

So I guess he must mean he played on Cass County. It seems Don is involving some new musicians.