(NEWSER) - A sixth former NFL player has been diagnosed posthumously with a rare brain disease, lending credence to claims that concussions sustained playing football can have a cumulative, even deadly, effect, the Tampa Tribune reports. Tom McHale, who played for the Buccaneers, died from an overdose of painkillers and cocaine in May. But doctors think his poor judgment could have been the result of chronic traumatic encephalopathy, commonly associated with boxers. More»