Wilder was picked up in Tuscaloosa by police officers after doing a search as they smelt the drug from the vehicle during a routine traffic stop. The 2008 Olympic bronze medallist was stopped by police in the fighter's home city of Tuscaloosa, Alabama for a tinted window vehicle violation.
Wilder was charged with misdemeanor marijuana possession and released on $1,000 bond.More news: Former NBA player Dennis Rodman arrives in North Korea
Officers said they then found drugs inside the vehicle.
"Officers obtained verbal consent to search the vehicle and recovered a misdemeanour amount of marijuana from the console", the Tuscaloosa Police Department said in a statement.
FILE - In this January 16, 2016, file photo, Deontay Wilder reacts after a WBC heavyweight title boxing match Artur Szpilka, of Poland, in NY.More news: Some hope California winner of $447M Powerball helps area
The American fighter's acting attorney Paul Patterson said the amount of marijuana was minimal and didn't belong to Wilder himself.
He is 38-0 with 37 knockouts in his boxing career, his most recent victory coming via knockout against Gerald Washington back in February.
Joshua has held the IBF boxing world title since 2016 and recently took ownership of the WBA and IBO world championships also; when he beat former champion Wladimir Klitschko earlier this year in April. "We hope this matter will be brought to a resolution soon".More news: England draw was one of the 'most emotional games ever' for Strachan