“The harm to Mayfield substantially outweighs harm to NASCAR. ... Mr. Mayfield can cough up a hair sample, and we can find out from a hair sample if he is a meth head (now),” Mullen said.

Mayfield is the first driver suspended under NASCAR's new random drug-testing policy implemented this season. He has missed the past six Sprint Cup points races.

Mayfield attorney Bill Diehl argued that NASCAR's drug-testing procedure was unfair and the amount of methamphetamine NASCAR says Mayfield had in his body would have resulted in people noticing a change in Mayfield.

“The suspension ... is directly caused by a drug-test result that's done patently unfairly and eliminates (Mayfield's ability) to show anybody that he is not a recreational drug user,” Diehl said. Later he added, “He's either a walking zombie or he's dead if he has that much methamphetamine in his body.”

Mayfield contends the findings resulted from a combination of prescription drug Adderall, which is used to treat attention-deficit hyperactivity disorder, and over-the-counter Claritin-D allergy medicine.

Judge Mullen said there was credence to Mayfield's claim that if he were under the influence of methamphetamines, his crew members and others would have noticed. Mayfield had his crew members sign affidavits saying they did not see any evidence that Mayfield had used drugs.