We're past the point of expecting top prospects to come up from the minors and immediately carry our Fantasy teams. That's not to say they can't do it, but the past few years should have recalibrated our expectations and gotten the term "can't-miss prospect" out of our vocabularies.

The Boston Red Sox called up top prospect Marcelo Mayer on Saturday, but fantasy managers might want to temper expectations for him against talented MLB pitching.

Three top fantasy baseball prospects - Jacob Misiorowski, Andrew Painter, Marcelo Mayer - that can make big impacts. These MLB prospects are waiver wire pickups or stashes.