Grizzlies player Brandon Clarke's cause of death released by LA County Medical ExaminerThe cause of death has been released for Memphis Grizzlies forward Brandon Clarke. The cause of death has been released for Memphis Grizzlies forward Brandon Clarke. The cause of death has been released for Memphis Grizzlies forward Brandon Clarke. The cause of death has been released for Memphis Grizzlies forward Brandon Clarke. LOS ANGELES -- Memphis Grizzlies forward Brandon Clarke died in May from the effects of heroin and cocaine, authorities said Friday.