  Maddox, et al. (2022) establish a new win probability estimation for college
basketball and compared the results with previous methods of Stern (1994),
Desphande and Jensen (2016) and Benz (2019). This paper proposes modifications
to the approach of Maddox, et al. (2022) for the NBA game and investigates the
performance of the model. Enhancements to the model are developed, and the
resulting adjusted model is compared with existing methods and to the ESPN
counterpart. To illustrate utility, all methods are applied to the November 23,
2019 game between the Chicago Bulls and Charlotte Hornets.
