Our experts answer readers' investing questions and write unbiased product reviews (here's how we assess investing products). Paid non-client promotion: In some cases, we receive a commission from our partners. Our opinions are always our own.Getty Images Josh Childress is a former NBA player who has made more than $60 million in his career after graduating from Stanford. Childress avoided the financial problems that some other athletes have faced. Childress explains that a big mistake players make is overestimating how much they actually get paid. Josh Childress, a former NBA player who has made more than $60 million in his career after graduating from Stanford, is now playing professionally in Australia.During an interview with Grit Media, Childress was asked how professional athletes go broke.Even though he's making less money now than when he played in the NBA, Childress says he has been able to avoid the financial problems that some other athletes have faced.Childress, who was the sixth pick of the 2004 NBA Draft and signed a four-year rookie contract worth $11.7 million, says the first mistake athletes make is overestimating how much money they have."The first mistake is, people say, 'Okay, I've got $11 million,'" Childress said.