There are numerous players who wore the number 4. Notable players are Chris Bosh, Anthony Randolph and Kenyon Martin.
Tim Duncan, KG,
There were several NBA players who wore the number 34. These includes Shaquille O'Neal, Ray Allen, Charles Barkley, and Hasheem Thabeet.
There are 270 players who wore the number 20 at one point. The notable players are: Ray Allen, Manu Ginobili, Gary Payton, and Micheal Ray Richardson.
Chris Webber of the Sacramento Kings and Alondo Tucker of the Phoenix Suns are 2 of many, many players who wore #4.
James Posey wore #41 for the Boston Celtics.
Pete Maravich "pistol pete" was #44.
Zaza Pachulia wore 27 on the Atlanta Hawks
No player yet, also no player has ever wore number 97