Team USA Soccer Star Megan Rapinoe -- Takes a Knee .... I'm With Colin Kaepernick

Team USA soccer star Megan Rapinoe made it absolutely clear she's on Colin Kaepernick's side ... taking a knee herself in a pro women's soccer match Sunday night.

Megan -- a midfielder for the Seattle Reign FC in the National Women's Soccer League -- said taking a knee during playing of the National Anthem just before kickoff against the Chicago Red Stars was absolutely intentional.

Megan told reporters she took the stand because she's disgusted with the way Colin's been treated and the hatred he's received. Colin's drawn a storm of criticism for first sitting and then taking a knee during the National Anthem.

The 49ers QB has also received a powerful ally -- President Obama.

As for Megan ... she went on to say, "Being a gay American, I know what it means to look at the flag and not have it protect all of your liberties. It was something small that I could do and something that I plan to keep doing in the future and hopefully spark some meaningful conversation around it. It’s important to have white people stand in support of people of color on this."