EDEN PRAIRIE, Minn. (AP) - 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.

The league's 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 while under house arrest for a drunken driving conviction. He blamed the results on a type of fermented tea called kombucha.

RELATED: Vikings coach Mike Zimmer to Michael Floyd: 'I'm going to cut you' if you lied

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.