On Sunday, the veteran's car reportedly collided with at least two other vehicles and overturned near Sunset Boulevard in Hollywood, California. The fighter refused to take a blood alcohol test, after which he was taken to the police station.
Half a day later, the athlete was released on bail - a $30,000 bail was posted for him.
Recall that Ferguson had his last fight in September last year, when he lost by submission to Nate Diaz. El Cucuy, 39, is on a five-game losing streak.