Math.
The Phoenix Suns sent out less players than they received as a part of the Damian Lillard-to-the-Bucks deal. Phoenix sent polarizing big man Deandre Ayton to the Portland Trail Blazers along with 52nd overall pick Toumani Camara. They received in return Jusuf Nurkic, Nassir Little, and Keon Johnson from Portland, as well as Grayson Allen from the Milwaukee Bucks.
Two out, four in. Two too many. You are permitted to have 15 players and, new this season across the NBA, three two-way contracts. The Suns currently roster 17 players and two two-way contracts.