Players on each MLB team have specific roles in 2013, but few of them are truly indispensable. Stars like Robinson Cano, Buster Posey and Justin Verlander will be pivotal if their respective teams sustain initial success.
This list emphasizes what these individuals contribute on the field, while acknowledging that intangibles like experience and personality can also make a positive impact.
Before proceeding, understand that there is minimal overlap between indispensable and most talented. The former is characterized by consistency rather than high ceilings. Wins above replacement (WAR) is important but not as much as wins that players provide above their specific replacements within the organization.