Boston GlobeMayfield suspended for substance abuse violationNascarBy David Caraviello, NASCAR.COM DARLINGTON, SC -- For the first time, a Sprint Cup driver has been busted for violating nascar's new random drug-testing policy.NASCAR suspends Mayfield for failed drug test MiamiHerald.comNASCAR driver Jeremy Mayfield fails drug test The Associated PressRotowire - Kansas City Star - Newsday - Auto Racing Dailyall 628 news articles