Dallas forward Dirk Nowitzki recently passed Iverson for 18th on the NBA's career scoring list.
Iverson believed it was more than the three years of NBA inactivity that has kept him from making a comeback. He blamed his behavior, which has included everything from coaching clashes to his infamous "Practice!" rant, for making teams shy about offering him a final chance.
"I realize my actions contributed to my early departure from the NBA," he wrote on Twitter. "Should God provide me another opportunity I will give it my all. My dream has always been to complete my legacy in the NBA."
Moore, who knew Iverson as an 8-year-old boy, said Iverson was focused on staying in shape in case an NBA team made an offer.
"Allen is not so naive of a man that he doesn't understand full well why he's not in the NBA," Moore said. "It not, poor Allen. Allen has done things that have really landed him outside of the NBA. He understands that. He understands the mistakes he's made."
Iverson spent 10 seasons in Philadelphia before bouncing through Denver, Detroit, and Memphis. He was the No. 1 overall pick in the 1996 draft, a four-time scoring champion, and averaged 26.7 points yet never won a championship.
Moore denied Iverson has financial problems. Iverson recently struck a reported $3 million financial settlement to help finalize his divorce with his wife, Tawanna.
"He's going through probably the most difficult of challenge he's ever faced in his life," Moore said. "There's no doubt he will get past that."
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