Barnes was on the bench for Dallas at the time as they beat the Charlotte Hornets 99-93. He is now averaging 17.7 points, 4.2 rebounds and 1.3 assists.
His caption read, "So let me guess this is cool cause they had to do what was best for the franchise right???"
"Traded this man while he was literally playing in the game and had ZERO idea", James said. I'm OK with both honestly. "Just call a ♠️ a ♠️!"
The post was liked by Anthony Davis, who has been at the center of trade talks for nearly two weeks since he requested to be dealt by the Pelicans.
National Basketball Association veteran Harrison Barnes reportedly knew he was on the verge of being traded - but judging by his on-camera reaction, he didn't expect it the deal to go through in the middle of a game.
Lionel Messi and Dembele hand Barcelona fitness boost ahead of El Clasico
Madrid sit eight points adrift of Barcelona in La Liga but have won their last five games in a row in all competitions. Real Madrid coach Santiago Solari had said earlier on Tuesday that he hoped Messi would be available.
I'm not the only one who thought the King had a point.
James went on to write that he saw a double standard with how people react to players changing teams in free agency or requesting trades - often calling them selfish - compared to their reactions when franchises ship out their own players. He will join a Sacramento team (28-26) on the cusp of a playoff spot in the Western Conference.
The Lakers have reportedly been trying to acquire him before Thursday's deadline, while the Boston Celtics are also believed to be interested.
"I don't know too much about Harrison", Kings center Willie Cauley-Stein told reporters Wednesday night.
Jackson was drafted by Sacramento with the 15th pick in the 2017 NBA Draft out of North Carolina, where he helped guide the Tar Heels to a National Championship as a junior after earning ACC Player of the Year, Consensus First Team All American and First Team All-ACC honors.