The owners returned home a short time later to find the animals on the driver and called the police.
Media inquiries directed to the victim's attorneys — O'Leary, Shelton, Corrigan, Peterson, Dalton & Quillin LLC in Maryland Heights — were not returned Wednesday.
FedEx also released a statement on the incident.
"First and foremost, our thoughts remain focused on the well-being of the individual involved in this incident," a FedEx spokesman said in an emailed response to questions about the incident. "There is no higher priority for FedEx Ground than the safety and security of our team members and we are cooperating fully with the investigating authorities at this time."
Heffington said there has been an increase in dog bite cases, caused in part by the greater number of deliveries during the coronavirus pandemic. He noted he had a serious dog bit himself several months ago during an investigation.
He cautioned people expecting deliveries to make sure their dogs are properly confined.
According to the American Kennel Club, American bulldogs are "a well-balanced athletic dog that demonstrate great strength, endurance, agility, and a friendly attitude. Historically, they were bred to be a utility dog used for working the farm" and can reach weights of 80-100 pounds.
Lollapalooza organizers on Thursday revealed the hour-by-hour lineup for seven of its eight stages, and a festival rep said Kidzapalooza, its popular area devoted to children’s activities, will return for Chicago’s biggest summer music event.