GameDay: New Warriors Coach Steve Kerr A Familiar Choice For Owner Joe LacobPeople like familiarity. That’s why Steve Kerr is the new coach of the Warriors. Owner Joe Lacob has known him for 20 years. General Manager Bob Myers did business with him when he was an agent, and Kerr was the GM for Phoenix. Kerr even knows Joe’s son, Kirk, who is the Warriors assistant general manager.