You cant really believe what you see in spring training or September anyways.
So playing Fisher (or any other rookie) right now wont really tell you much IMO
No, its because the season is lost anyways. Might as well use them to fill in the roster.
They'll be released, sent down or traded in the winter, I guarantee it
I dont know how to make a gif, but here's the McKinney video
https://www.mlb.com/video/daniel-robertson-singles-on-a-line-drive-to-right-fielder-billy-mckinney-kevin-k