Sheldon Reynolds is dead at 63, 36 years after 1987, the key year mentioned in his passing.
666, 36th triangular number
Sheldon Reynolds = 216 (6x6x6=216)
Rockstar = 666
Notice he died exactly 36 weeks after his September 13 birthday.
He has died during the 76th anniversary season of the NBA, the 77th pro basketball season.
Earth, Wind & Fire = 76 & 77