Source[3] Douglas played on the team presenting the US at the 1999 World University Games held in Palma de Mallorca, Spain.

Before becoming an all-star in the league, Douglas earned some WNBA Finals experience early in her career while the Connecticut Sun were championship contenders in both the 2004 and 2005 seasons.

The Sun made it to the finals in both seasons but would lose both times to the Seattle Storm and Sacramento Monarchs respectively.

On February 19, 2008, the Connecticut Sun traded Douglas to her hometown team, the Indiana Fever for Tamika Whitmore and the Fever's first round pick in the 2008 WNBA Draft, she would play alongside superstar small forward Tamika Catchings.

[6] She also scored a career high and franchise record, 34 points in a regular season game win against the Washington Mystics and averaged a career-high 17.6 ppg.

A few seasons later, Douglas would win her first WNBA Championship with the Indiana Fever in 2012 as they had beat the Minnesota Lynx 3–1.

[7] With a few seconds left in the final game of the series at home and the Fever with a comfortable lead, Douglas was subbed in while the crowd was giving a standing ovation.

In a regular season game win against the Atlanta Dream, Douglas scored 29 points along with a franchise-record 7 three-pointers.

On March 24, 2014, Douglas returned to the Connecticut Sun in free agency, signing a 2-year deal with a third-year option.

[12][13][14] She had another productive season averaging 13.1 ppg and was voted into the WNBA all-star game for the fifth time in her career.

[22] Douglas played for Galatasaray of the Turkish League during the 2009-10 off-season with then Indiana Fever teammate Tamika Catchings.

[24] One week after the 2005 WNBA Finals loss to the Sacramento Monarchs, Douglas married Vasilis Giapalakis in Athens, Greece.