In 2010, the NBA fined Dumars $500,000 for leaking multiple confidential league memos to Wojnarowski, according to multiple sources. This matches the third largest publicly known fine the league has ever handed down. The NBA decided that too many memos were making it into the media, so they conducted a sting operation over several months. They would change a few words or numbers in different team’s copies of otherwise identical memos, so that when the memos leaked they could spot the small differences and trace them back to the leaker. This approach caught Dumars red-handed, as well as an executive from another team who was fined $12,500 for leaking to a draft-focused website. Joe Dumars, the Detroit Pistons, and the NBA all declined to comment on the fine.
http://www.newrepublic.com/article/1205 ... his-scoops
First I ever heard if this - sorry if it's old news. Whole article is interesting - including all the news Woj broke on the Pistons making it very obvious he had deep source connections in the Pistons.