Preheat oven to 350 degrees.
Add cake mix and one can of Dr Pepper soda to a large bowl.
Mix until combined then pour into a greased baking dish. I prefer an extra thick cake so I used an 8x8 but 9x13 works too.
Bake as directed on the cake mix box.
Let cool then invert on a cutting board or platter.
If you want to shape it like a football, I used a small football shaped bowl and cut out the 8x8 cake into a football shape.
Frost with chocolate fudge frosting all over then add white icing football laces to the center of the cake.
Notes: No eggs, water, or oil needed. You can use any canned soda you like.