his urine sample. Mayfield, who was suspended indefinitely on May 9 for failing a NASCAR drug test, has denied ever using the illegal drug. Earlier this month a federal judge granted Mayfield a temporary injunction lifting the suspension, a decision NASCAR is appealing. Mayfield "We're very excited about the results," Mayfield told WCNC NewsChannel 35 after LabCorp sent test results to Mayfield's attorneys showing he tested negative for meth. The results, Mayfield said, are from a urine ...