Hello Gitsy,
Fruits (especially bananas, blueberries, raspberries, apples)
Instant Oatmeal (plain)
Sweet Potatoes
Whole Grain Breads
Eggs
Steak
Chicken
Fish (tuna,salmon)
Turkey
Spinach
Broccoli
Almonds/cashews/peanuts
Protein Shakes
Multivitamin
I am guessing you will have a chance to eat a good breakfast every morning before football training and here is a basic idea for what you should have every morning
CARBS - a few slices of lightly toasted whole grain bread with a little butter
OR
a big bowl of oatmeal
Throw some fresh fruit in the oatmeal (if this isnt flavorful enough for you to eat easily then just throw some honey in there too I guess)
PROTEIN - at least 3 eggs (prepare however you wish..hardboiled...scrambled with cheese...whatever)
or... milk+whey protein powder+ice in blender
if you dont have the time to make food....
throw this in a blender
Milk
Whey Protein Powder
1 cup frozen blueberries OR 1 or 2 bananas
Natural peanut butter
Honey
drink it!
Let me know if it worked for you ! !