The Vikings' announcement Friday gave no details of the violation. But an Arizona judge last month ordered Floyd to serve one day in jail for failing alcohol tests after a traffic stop last year. He blamed the results on a type of fermented tea called kombucha.
The case stemmed from a 2016 drunken driving arrest when Scottsdale police found him passed out behind the wheel. He pleaded guilty in February to extreme drunken driving. He had a blood-alcohol level of more than 2½ times the legal limit in Arizona.
Floyd had faced a minimum two-game suspension for the violation.
Floyd will be allowed to participate in all preseason practices and games. He can return to the active roster Oct. 2.
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The NFL has suspended Minnesota Vikings wide receiver Michael Floyd without pay for the first four games of the regular season for violating its substance-abuse policy.