Kelly Naqi, writing for ESPN.com, reports a confidential source says he's been involved in dog fighting for over 30 years and has trained and fought around 2,000 pit bulls. He was poised to tell "Outside the Lines" about the time in 2000 when his dog squared off against a dog owned by someone he referred as one of the "heavyweights" of the dog fighting world. "He's a pit bull fighter," the source said of Atlanta Falcons QB Michael Vick. "He's one of the ones that they call 'the big boys:' that's who bets a large dollar. And they have the money to bet large money. As I'm talking about large money -- $30,000 to $40,000 -- even higher. He's one of the heavyweights." The source has helped law enforcement by supplying information on dog fights that has led to dozens of felony arrests. The source said Vick is known in the dog fighting community as "the man that comes with all the money" and his reputation is "[that] he brings a good dog and he's going to bet and he's going bring a nice sum of cash."