Soccer/Football

But for goalkeepers, whose bodies are in constant contact with the turf, it can be far worse. In practices and games, they make hundreds of dives, and each plunge sends a black cloud of tire pellets into the air. The granules get into their cuts and scrapes, and into their mouths. Griffin wondered if those crumbs - which have been known to contain carcinogens and chemicals - were making players sick.

"I've coached for 26, 27 years," she said. "My first 15 years, I never heard anything about this. All of a sudden it seems to be a stream of kids."

Since then, Griffin has compiled a list of 38 American soccer players -- 34 of them goalies - who have been diagnosed with cancer. At least a dozen played in Washington, but the geographic spread is nationwide. Blood cancers like lymphoma and leukemia dominate the list.