USA TODAYDustin Johnson reportedly failed a drug testMiamiHerald.com(SportsNetwork.com) - Dustin Johnson reportedly failed a third drug test and that is apparently the reason he is taking a leave of absence from the PGA Tour. According to a Golf.com report, Johnson has failed three drug tests, one for marijuana in 2009 and ...Report: Dustin Johnson hit with six-month ban from PGA Tour after testing ...New York Daily NewsDustin Johnson reportedly suspended from PGA Tour for six months for failed ...al.comReport: Dustin Johnson's 'leave of absence' is a cocaine suspensionCBSSports.comGolfweek.com -NewsOK.com -WLS-TVall 321 news articles »