Rock Quiz: Warren Zevon [September 7]

Q) Warren Zevon passed away on this day in 2003 at the age of 56.  His biggest hit 'Werewolves of London' was released in 1978, but three years prior, ironically on this date in 1975, the singer who helped Warren get his first record deal played the song live on stage in Pennsylvania.   He later co-produced Warren's album 'Excitable Boy'.  Who is it?

A) JACKSON BROWNE