Deontay Wilder spent a part of his Tuesday behind bars.
The former WBC heavyweight world champion was arrested in Los Angeles following a routine traffic stop.
Wilder was pulled over in Hollywood at around 1:15 AM after officers claimed his Rolls-Royce's windows were illegally tinted and his license plate was obstructed.
Authorities say they smelled an odor of burnt marijuana emanating from his vehicle -- so they searched the car.
TMZ reported that officers allegedly found weed and a 9mm handgun in the vehicle, and handcuffed Wilder.
The 6-foot-7 Wilder was cooperative and friendly during the process.
Wilder (43-2-1, 41 KOs) was booked on a charge of possession of a concealed weapon. The 37-year-old posted a $35,000 bond at 6:34 AM. He is due back in court on May 23, where he could face a felony charge and be fined up to $10,000.
It now remains to be seen if Wilder's legal trouble has any effect on reported negotiations for a mega bout against Anthony Joshua.
Wilder rebounded following two straight defeats to Tyson Fury with a first-round knockout over Robert Helenius last October.
The 2008 Olympic bronze medalist stated on social media at 12:52 PM ET, "I'd rather be safe than sorry. The End."