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

The Boston Celtics have reportedly traded big man Kristaps Porzingis to the Atlanta Hawks as part of a three-team trade.

"Boston, Atlanta and Brooklyn are finalizing a three-team trade that sends Kristaps Porzingis and a second-round pick to the Hawks, Terance Mann and Atlanta's No. 22 pick to the Nets, and Georges Niang and a second-rounder to the Celtics ," Charania said.