Former college football player Ray Lewis III -- the son of Hall of Fame linebacker Ray Lewis -- died from an overdose ... this according to police.
TMZ Sports obtained the overdose report from police in Florida ... and it says Lewis apparently died from an accidental overdose.
Police say they responded to a call for a medical emergency and found an unresponsive Lewis, who was getting CPR from a friend while another friend was screaming for Narcan (a drug used during overdoses).