The Boston Celtics acquired Anfernee Simons as part of the Jrue Holiday trade, but the veteran guard may be on the move yet again.

And for the first time since the trade, Holiday acknowledged it with an Instagram story. “Thank you Boston” the story said, which included a picture of Holiday wearing the Celtics championship hat after they defeated the Dallas Mavericks in the NBA Finals.

The Boston Celtics traded Jrue Holiday and Kristaps Porzingis. Why did they do that? What could be next? Here's an explainer.