One person he's likely to keep, though? Head coach Dwane Casey. Via the Toronto Sun:
Casey, according to league sources, has already spoken at length with Ujiri and (Raptors CEO Tim) Leiweke and would seem safe from any purge. He has a year left on his contract.
Before being hired by the Raptors, Casey was regarded as one of the top assistants in the league and a hot candidate to be a head coach. But with a mediocre roster, Casey hasn't been able to find much success so far in Toronto. The team has shown signs of completely buying into his defensive, tough-minded system, but the results haven't been consistent.
Casey will be entering his third season, coming off a 23-win season his first year and a 34-win one last season. Despite the win-total jump, the team didn't necessarily seem to be taking the steps forward that were hoped. But the team made a big trade for Rudy Gay midseason and finished somewhat strong.
So he'll likely get a third year. But you can be sure Ujiri and Leiweke will have a close eye on him. If you want a coach on the hot seat for next season, Casey's already there.