Referee Lauren Holtkamp-Sterling made NBA history Friday night when she became the first mother to officiate a league game. Holtkamp-Sterling worked the Bulls-Warriors game in Chicago. The game was the first for Holtkamp-Sterling since she gave birth to her daughter, Stoan, earlier this year. She missed last season because of a knee injury that required surgery, and the start of her 2019-20 season was delayed by abdominal surgery.