You may not realize it but majority of the gains you make in training are related to how you eat and what you drink.
How you perform on the field is often directly related to how well you nourish your body.
Remember that when you are playing and training you need a lot of calories because you will burn energy rapidly.
In season is not the time to think about going on a diet and losing weight. Although for some of you that may happen naturally as you get in better shape.