Faced with traumatic brain injury, depression, chronic pain, and addictive medication, former NFL players are coming together in support of medical marijuana. Thirty ex-NFL players have teamed up with a cannabis company in California to test medical marijuana as a treatment for chronic pain and depression. The move comes in the wake of increasing reports on the physical and mental anguish retired football players face, including a potentially debilitating brain disease called chronic traumatic encephalopathy…