John Wall Pens Emotional Farewell To D.C. After Trade To Rockets, 'Thank You!'

John Wall is pouring his heart out to his fans in Washington D.C. after being traded to Houston ... thanking his supporters for treating him like family over the past 10 years.

The #1 overall pick in 2010 was just shipped to the Rockets in exchange for Russell Westbrook in a blockbuster trade on Wednesday ... officially ending his run in the nation's capital.

Wall -- who was beloved in the city and active in the community since joining the NBA -- was sure to thank his former home in an emotional tribute on Thursday.

"I came to D.C. as a skinny 19-year-old with big dreams and goals," Wall said.

"You embraced me and my family with open arms. You rocked with me from day one until now."

He continued ... "From a young rookie to an All-Star, I did my best to make you proud. Through good times like that Game 6 versus Boston, through injuries & rehab, I always felt the love from you."

"I appreciate you and will ALWAYS have love for D.C."

Remember, Wall continued to give back to the city despite trade rumors just weeks ago ... handing out 1,000 Thanksgiving meals throughout the community.

Wall says he'll always appreciate everyone in D.C. ... no matter what team he's suiting up for.

"I may not wear the jersey anymore but I will never forget what it meant to represent for y'all."