Tyson Foods says supply-chain chief leaves after violating conduct rules

By Tom Polansek CHICAGO (Reuters) -Tyson Foods' chief supply chain officer, who has also overseen its beef, pork and prepared foods businesses, left the U.S. meatpacker after violating the company's code of conduct, according to a statement. The departure of Brady Stewart is the latest management change at Tyson Foods, which replaced former Chief Financial Officer John R. Tyson last year