Ohh please. It is very impossible to say who the most active player in the NBA. So maybe if you put up the player's name on whatever. And make people vote who's best active player... So what's your opinon?
The shortest active NBA player is Earl Boykins at 5'5.
Robert PArish played 21 seasons, longest in the NBA.
Shaquille O'Neal is the current oldest active player in the NBA as of 2010 he's 38.