It's risky these days to call any prospect untouchable, as we've seen too many blockbuster deals in recent years to believe anyone is 100 percent safe from being moved in the right deal.
Case in point: The Cleveland Indians' trade of highly regarded catching prospect Francisco Mejia to the San Diego Padres for relievers Brad Hand and Adam Cimber this past summer.
That said, a handful of prospects around the league come awfully close to being untouchable, as their future upside and expected long-term role with their teams make trading them highly unlikely.
Ahead is a look at each MLB team's most untouchable prospect, though a number of teams didn't qualify for this exercise, as rebuilding teams are unlikely to trade any prospects, period.