Certainly the most high profile name among all players in the D-League, the 34-year-old Antoine Walker is not having the easiest time in his quest to get back into the NBA, putting up a good amount of points but needing a lot of shots to do it and turning the ball over at an extremely high rate on top of it.
Beyond that, Walker is still not in very good shape despite already reportedly losing a ton of weight, having a great deal of extra weight on his body that limits his speed, explosiveness, and conditioning. This shows up most notably on the defensive end, where he is mostly forced to guard centers at this level due to his lack of lateral quickness. Walker's attitude is equally alarming, as while he's not necessarily a bad teammate, he takes off plays and is constantly complaining to officials, clearly struggling with where he's at as a player right now.
While his shooting is erratic and inconsistent, Walker still clearly has some ability in that regard, but not nearly enough to make up for his other weak areas from an NBA perspective. Given his age and how much farther he has to go to get into shape, as well as how poorly he performed at the Showcase, Walker's NBA hopes seem unlikely at best.