Welcome to the forum. I hope to see lots of your photographs in the future.
The pics you've posted are way too small. You can post up to 1024 pixels on the longest side. When the pics are this small, it is difficult to tell anything about the quality of the image.
Remember to shoot faces in your sports images. Basketball players will inevitably face the basket when they shoot so a good position to photograph from is along the baseline under the basket. Just stay outside the lane markings so players have room to run after they drive to the hoop.
As much as possible, remember to "Shoot Tight, Crop Tighter"
Good luck.
Phil