How does the energy used by an athlete during a football game comes from energy of sunlight

My best guess would be all the healthy things that can come from the sun

The athlete may of consumed some plant based food which is grown from light from the sun via photosynthesis. Furthermore, the sun helps grow stuff such as grass which certain animals eat, consequently if the athlete ate any meat that theoretically came from the energy of the animals food such as grass which got its energy from the sun.