Some of these shots are pretty decent compared to what I have seen in sports photography.
All I can say is get closer to your subject.
You seem like you're shooting from a pretty high angle, so if you can, trying shooting from a lower angle.
Use a telephoto lens to create some DoF and isolate your subjects for a more dramatic shot.
P.S. This thread has 90+ views and 1 reply. I wonder why.. lmao.