Linebacker Cushing's positive test result was for HCG.

( how about claiming he has a fetish for drinking the urine of pregnant girls, more original than the tainted nutritional supplement defense )

Houston Texans linebacker Brian Cushing tested positive for HCG, a fertility drug that is on the NFL's banned substance list.

A person familiar with Cushing's case told The Associated Press on Tuesday that Cushing had one positive test in September, then subsequently tested negative several times. The person spoke on condition of anonymity because the test results were supposed to remain confidential.

"He had one low-level positive test for HCG in September, and then every test after that was negative," the source said. "He has said he has no idea where the positive test came from."

The NFL has suspended Cushing, of Park Ridge, for the first four games of the season and there's a new vote being taken for the AP's NFL Defensive Rookie of the Year honor, which Cushing won after the season.