Marbury spoke Monday about the federal dogfighting conspiracy charges against Vick while promoting his basketball shoe in Albany, N.Y.
"I think it's tough," Marbury said, according to Albany TV station Capital News 9. "I think, you know, we don't say anything about people who shoot deer or shoot other animals. You know, from what I hear, dogfighting is a sport. It's just behind closed doors."
On Monday, Vick said through a lawyer that he will plead guilty to a federal charge of conspiracy to travel in interstate commerce in aid of unlawful activities and conspiracy to sponsor a dog in an animal fighting venture. He also faces possible prosecution in Virginia.
"I think it's tough that we build Michael Vick up and then we break him down," Marbury said. "I think he's one of the superb athletes, and he's a good human being. I just think that he fell into a bad situation."