When the green flag drops on NBA free agency on Sunday, the queue of general managers ready to spend will depend on which players actually reach the open market. Changes in the Collective Bargaining Agreement permitted players to re-sign with their current teams and a number of coveted potential free agents are already off the board. Pascal Siakam ($189.5 million) returned to the Indiana Pacers, OG Anunoby ($212.5 million) is back with the Knicks, Immanuel Quickley ($175 million) agreed to stick with the Raptors, Nic Claxton (four years, $100 million) grabbed a bag in Brooklyn and Malik Monk ($78 million) re-upped with the Kings after his runner-up Sixth Man of the Year award finish. Several other would-be free agents in line for significant paydays also signed new contracts during la…