Celtics center Kristaps Porzingis was a teammate of Doncic in Dallas. "I think this is the craziest trade in NBA history. Unbelievable,” Porzingis said.

Kristaps Porziņģis, who played alongside Dončić in Dallas for 2 1/2 seasons, sounded as surprised as anyone. Porziņģis said his phone wasn’t working, so he learned about the trade when someone told him about it on the streets of Philadelphia, where the Celtics were in town to meet the Philadelphia 76ers.

Here's how the blockbuster trade between the Lakers and Mavericks affects the Celtics. Read more on Boston.com.