He must do something to make bread. Then there is the NBA pension which isn’t huge money but up to $200k a year depending on age and years played. (yes, I just looked it up).
According to this you can start drawing as young as 45 but it is reduced, they recommend waiting to 62:
https://hoopshype.com/2020/03/02/how-nba-pensions-work/
Lamar is 41.