Welcome RotoBallers to our fantasy baseball breakout hitters article for Week 19. As always, we are here to bring you a few MLB hitters whose advanced metrics are popping out.My name is Joshua Costello, and I will be giving you 3-5 hitter names that seem to have sustainable improved production this season. Most of these names will be young hitters because that is the nature of a breakout. There will be exceptions from time-to-time as well as I give you more well-known and well-established names ...