http://probaseballinsider.com/baseba...l-positioning/
This is what I found, so assuming one can relate that web sites terminology to OOTP's, you can see some of the reasoning behind the strategy,
http://cmbaseballsoftball.org/2e5ca8...3833/37462.pdf
This is WAY more detailed on the same subject. Even in otherwise identical situations, a fast runner on first with a weak armed catcher and a pitcher who doesn't hold runners well, might not be handled identically if it instead was a slow runner, a catcher with a cannon, and Steve Carlton on the mound.