Credited with helping to shape the Southern California country-rock sound of the mid-1970s, J.D. Souther co-wrote the Eagles' 'New Kid in Town' and 'Best of My Love' and Ronstadt's 'Faithless Love,' among other hits.

John David Souther, better known as JD Souther and celebrated for helping to shape the country rock movement in 1970s Southern California, passed away at the age of 78 on Tuesday, September 17. While no cause of death was provided,

He penned hits for the Eagles, Linda Ronstadt and James Taylor and found a burst of solo success with “You’re Only Lonely.”