Question from WCWS

[Dakota]

Originally Posted by mbcrowder

...There is no case where a collision could occur where the fielder is about to receive a ball that is closer to him than the runner - the collision makes that distance zero...

Not to belabor the point (since I think we agree, here), but you are using precise physics to describe a playing action being observed by a human. In the situation where both ball and runner arrive at the same (observable) time, it is still a wreck.