Yet another good example of how overhyped baseball prospects and how the perception of the material impact they have greatly differs than actuality in most situations. Fox is a good example, as his "value over replacement" is actually negative unless they put him at second base.
His biggest flaw is his lack of concept of the strike zone. So yes, I guess Pinella lost his mind by not puting him in against a pitcher that has dominated his career by getting people to swing out of the zone.