More specifically, I play 3rd base on a field that uses a coarse-grade kitty-litter-like substance to dry out the fields (which themselves, I'm convinced, are pure concrete).
Unfortunately, standing about 65 feet from batters who can hit the ball upwards of 90mph leaves little in the way of reaction time.
Couple that with the random edges of the kitty litter and every grounder, every hop, is an adventure.
This adventure ended with a 7-1/2 seam softball imprint on the inside of my left knee. I think that's a personal record.