If the Giants were to completely tear it down and start over, that process from start to finish obviously takes several years as all of us Sox fans are well aware of. Schwarber has 3 years of control left, Almora 4, and Happ 5. The Giants would only reap the rewards of taking on those guys for a short period of time in a couple years and that's if their rebuild progressed fairly quickly. That just doesn't make a whole lot of sense to me. It might be a different story if the Cubs had several top prospects whose MLB service time hadn't started yet, but that's not the case.