I think I figured it out

I think I know why my leg got infected after sliding.  My knee was a little cranky, too, but it seems to be fine now.  Since there isn't a whole lot of water here in the desert, the city parks and rec department was using non-potable water to water the fields.  The infield was watered between every game or two, to soften it up and keep the dust down.  So, yes, I guess I was sliding in poo laden dirt.  Now that I know, I'll have to scour my strawberries with hydrogen peroxide while at the ball park instead of waiting until I get home.