The Boston Celtics are reportedly finalizing a trade to send Kristaps Porziņģis to the Atlanta Hawks in a three-team deal also involving the Brooklyn Nets, per ESPN's Shams Charania.

Between salary and luxury taxes, the Celtics were on pace to spend almost $500 million in payroll for next season. That was untenable, especially for a team that no longer feels like a legit title contender. Boston's new owner, Bill Chisholm, does not want to lose money on the team he just bought for $6 billion.

The Celtics made their first big move of the offseason on Monday night when they traded Jrue Holiday to the Portland Trail Blazers in exchange for Anfernee Simons and two second-round picks.