Unidentified informant to ESPN: Vick bet on dog fights

A man whom law enforcement agencies have used as an informant in prosecuting dog-fighting cases in Virginia tells ESPN that Atlanta Falcons quarterback Michael Vick is "one of the heavyweights" in the sport.

"He's a pit bull fighter," the source says of 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."