Showing God's mathematical pattern of Earth's geological and historic features,as well as that same pattern in the Heavens, Proving that Jesus was/is God's Son, and, that the prophets and stories of the world's religions and tribes are of God
Also, to stop concusions and career ending injuries, slow the players down a bit; the fast astroturf, the high tech shoes, the light and small pads, ALL greatly increase speed. Physics says this means the force of impact is higher, thus damage is greater.
Proof of God : Geometry Of The Cosmos 