WME music agent Joseph Martin has moved to CAA, where he will boost the agency’s Nashville music operations. At WME’s Los Angeles office he booked contemporary music artists, and now will focus on CAA’s country roster that includes Zac Brown Band, Keith Urban, Dixie Chicks, Tim McGraw, Shania Twain, Maren Morris, Lady Antebellum and more. He joine CAA Music’s Nashville team that includes John Huie, Rod Essig, Marc Dennis, Darin Murphy and Scott Clayton.