softball bunt coverage

Question
Have you ever heard of first baseman covering third on any bunt? My daughter high school coach is teaching them that and I don't understand!!

Answer
Bessie,

Can't say as I am familiar with this one.

I guess I can see the reasoning.  If F3 doesn't field the bunt, they really don't have anything to do.  A quick sprint to 3rd could prevent the runner from heading to third.

Most coaches have the pitcher take the base if F5 covers the bunt.

Tom