Right now Tatum son is 6 and Tatum is 26, so Tatum would have to play at least 13 more seasons. It sounds crazy but the thought of Bronny playing with Lebron in 2010 (Lebron was 26, Bronny was 6) would have been a crazy idea back then. Out of all NBA stars, I think Tatum has the best chance to play with his son after Lebron
There have been roughly 5000 different players in the NBA throughout its history and there has been only one single father son duo. I’d say the chances are pretty slim.