rest - http://espn.go.com/nfl/story/_/id/13...ped-found-testSAN DIEGO -- Antonio Gates told reporters here on Thursday, the opening day of training camp for the San Diego Chargers, that he has no idea how a substance that triggered a positive test for performance-enhancing drugs got into his body.
"When I got the information I was shocked," said Gates, speaking publicly for the first time since the league's announcement that he tested positive earlier this month.
"I knew coming into minicamp (in June) that I was dealing with it. But a four-game suspension was never in my mind."