Celtics to trade Porzingis to Hawks, sources say

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, sources told ESPN's Shams Charania on Tuesday night.

Boston has been creative this week, and Tuesday's trade of Porzingis now puts the Celtics under the second apron. On Monday, the Celtics dealt Jrue Holiday to the Portland Trail Blazers for Anfernee Simons and two second-round draft picks, sources told Charania. All told, the trades will save Boston a projected $180 million in tax penalties.

Porzingis, 29, averaged 19.5 and 6.8 rebounds last season, helping the Celtics to a 61-21 regular season. Boston was eliminated in the second round by the New York Knicks, one of Porzingis' former teams.

Niang, 32, averaged 9.9 points and 3.4 rebounds for the Hawks last season.