Petty had been suffering from “many serious ailments including emphysema, knee problems and most significantly a fractured hip.”
Plus, they dedicated Funkadelic’s “What Is Soul?” to the late rock legend.
The cover opened their set at this weekend’s Cal Jam.
18-song set spanned Petty’s over four-decades-long career.
Heartbreakers frontman suffered from full cardiac arrest.
The 66-year-old rock legend was found unconscious in his Malibu home on Sunday.