They're taken when leaving home

Usage examples of basepaths.

Only the bare outlines of basepaths and a pitcher's mound remained, and what should have been the skin part of the infield was covered with weeds.

I remember South Field when it was an athletic field in the middle of the campus: brown dirt, basepaths, fence.

Which probably means keep the games and the balls away from the building and out in the vacant lot where the deep ruts of the basepaths and the ragged hill of the pitcher's mound can still be seen, but who can say for sure?