For all of the great songs Glenn Frey and Don Henley wrote together in the Eagles, JD Souther was the glue that connected these songs together.

Frey ended up in Linda Ronstadt's backing band, where he met the musicians who would split off to form the Eagles in short order, and Souther would become one of the group's most valuable collaborators over the years, co-writing a number of the Eagles' biggest hits.