"Ramblin' Gamblin' Man" (1969)
Frey got his first taste of real recording backing up fellow Michigander Bob Seger, strumming acoustic guitar and singing background vocals on this ferocious bit of garage rock. Listen for Frey in the chorus: That's him singing the high "ramblin' man" part. "You can really hear Glen blurt out on the first chorus. He comes out really loud, tremendous gusto," Seger says in the History of the Eagles documentary. Added Frey, "The most important thing that happened to me while I was in Detroit was I met Bob Seger."