By Bryan Armen Graham
May 08, 2012

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.

"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."

Kizer confirmed Mayweather's post-fight test result was negative, as were those Cotto, Saul "Canelo" Alvarez and Shane Mosley.

The pre-fight test results will be available on Friday, Kizer said.

-- Bryan Armen Graham

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