I think if your going all out in your practices/games you most likely don't need it as you seem pretty active. HIIT of course isn't going to hurt but you need some time to recover and your schedule seems fairly full already.
If you still want to burn a few extra calories maybe some light treadmill work before/after your workouts would help out. That way your not overtraining from it and its just a little extra time in the gym anyhow.
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