Oct 25, 2009 9:44 AM EST

During the last several months, former NBA forward Antoine Walker has been pursued by multiple financial institutions for unpaid debts.

According to the Boston Globe, those debts total more than $4 million.

Walker earned more than $110 million during his career, but a number of NBA sources claim that the former Celtic squandered away all of his money.

"I know Antoine has enjoyed himself," said a former teammate. "He had a good time, as all professionals who are in that situation should. But there's tough lessons you learn about the responsibilities that come with being a professional athlete that makes a lot of money. Sometimes this is one of the consequences to that."

Via Boston Globe