The best defensive baseball player in the world plays shortstop for the Atlanta Braves. His name is Andrelton Simmons, and he's pretty damn amazing. Here is 25 minutes of him doing what he does best.
For my money, the two best plays of the year start at 1:07 and 16:17. I've never seen anyone make the latter play before, and when you consider the situation and the fact that it took place in the 14th inning ... yeah. Unreal.