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I would agree with shutter priority as being an option, but I disagree with the "stick to it" advice. I have shot over 1 million subjects, 99% of them moving kids in all sports and I have NEVER, repeat NEVER shot shutter priority. You have to know your camera and how it works. With that knowledge, shutter priority becomes and OPTION. But, so does Av, Manual, Auto ISO. There is no steadfast rule.
You did okay here. Yeah, the cut limb shots are scrapper for the most part, but I do like the winning line jube shot despite the cut legs, but it should have been shot vertically.
The others though fall short on emotion, interest, and intensity. You did fine technically, but work needs to be done in really capturing the "art" of the face.