After playing in the Paulista League in Brazil for BCN Osasco in 2001 and leading the league in scoring, Castro Marques was invited to the Miami Sol's training camp. After training camp, she would make the final cut for team and signed with the Sol. In her rookie season, Castro Marques was the second-youngest player in the WNBA at the time (20 years, 1 month, 12 days).

At the end of 2002 season, the Miami Sol folded and Castro Marques would sign with the Phoenix Mercury in 2003. The Mercury would waive Castro Marques at the end of the season. Castro Marques chose not to play in the WNBA in 2004 to focus on the Brazilian national team for the Summer Olympics that year.

In 2005, Castro Marques returned to the WNBA and signed with the Seattle Storm, becoming a starter for the first time in her career. In the early part of the 2006 season, her erratic play got her benched in favor of rookie Barbara Turner, but Castro Marques came back strong after eight games in reserve, and never relinquished the starting job during that season. In the 2007 season, Castro Marques started in all 34 games while averaging 12.3 ppg, making it the first time she averaged double-digits in scoring. Castro Marques had also gained some playoff experience for the first time in her career in her three-year stint with the Storm.

On February 6, 2008, Castro Marques was traded by Seattle to the Atlanta Dream along with the Storm's first round pick in exchange for Roneeka Hodges and the fourth overall pick in the 2008 draft. In her four-year stint with the Atlanta Dream from 2008-2011, she played with fellow Brazilian Érika de Souza, whom she played with in high school back in Brazil. Castro Marques had the best years of her career in Atlanta, especially in the 2010 season where she averaged a career-high 16.9 ppg and had also helped Atlanta reach the WNBA Finals twice.

...
Wikipedia