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"&lt;p&gt;&lt;/p&gt;&lt;p&gt;An Internet rumor that gained steam Tuesday alleged Floyd Mayweather failed a drug test related to Saturday's super welterweight title fight against Miguel Cotto.&lt;/p&gt;&lt;p&gt;\"Not true from our end,\" said Keith Kizer, executive director of the Nevada State Athletic Commission, in an email to SI.com. \"All tests negative so far.\"&lt;/p&gt;&lt;p&gt;Kizer confirmed Mayweather's post-fight test result was negative, as were those Cotto, Saul \"Canelo\" Alvarez and Shane Mosley.&lt;/p&gt;&lt;p&gt;The pre-fight test results will be available on Friday, Kizer said.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;&lt;em&gt;-- Bryan Armen Graham&lt;/em&gt;&lt;/strong&gt;&lt;/p&gt;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.si.com/boxing/counter-punch/2012/05/08/floyd-mayweather-passes-post-fight-drug-test>