Udoka’s 10-day stint with the Lakers — and Phil Jackson, whom Kerr also played for — might not have informed much of who he is as a coach today, but it does speak to his work ethic. He’s someone willing to fight for a job in the league from its most meager starting point. “Talking about where he started, 10-day contracts and things like that, he’s obviously had to work his way to get here,” Celtics star Jayson Tatum said. “And he carries that sense of toughness with him and does instill that into the group every day. Proud of him.