Drug czar: Mayfield in 'clear violation'
Sprint Cup driver Jeremy Mayfield's explanation -- that two allowed medications may have combined to result in a failed drug test -- isn't plausible, NASCAR's substance abuse policy administrator told USA Today.
"What we have is a clear violation of policy," David Black said, according to the newspaper. "In my many years of experience, I have never seen a violation like this due to the combination of over-the-counter or prescription products."
Black, whose Tennessee-based Aegis ...
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