The NBA said Portis tested positive for Tramadol, a pain medication that is banned by the league and is also on the World Anti-Doping Agency's list of banned drugs. Mark Bartelstein, Portis' agent ...

The NBA said Portis tested positive for the drug Tramadol, a medication used to treat severe pain among adults. "I was dealing with an elbow injury and using an NBA-approved medication for pain ...