"John Brenkus will unveil the winner of each bracket matchup on "SportsCenter" based on a series of metrics including speed, strength, durability, reaction time and much more."
So I guess it's not really based on voting at all...interested to see what they come up with although it's bound to be full of holes.
Let's compare Silva and Phelps. Durability would goto Phelps, and strength I would imagine..everything else 'athletic' related I would imagine goes to Silva.
I would lean towards Lebron as probably the most amazing athlete the human race has seen..his quickness and skillfulness for someone so large and powerful is astounding.