Franchise centerpieces are building blocks. Generally, they are talented, coachable players that we all expect to contribute for the foreseeable future without changing uniforms.
Every MLB team has at least one.
As a result of the criteria, this list is mainly comprised of young individuals. The exceptions are soon-to-be free agents who committed to an organization—either at a hometown discount or market price—because they value being the face that links a generation of fans.
You'll also notice that position players beat out pitchers in most cases, and that's because their performance is easier to project.
The following guys are the present and future of Major League Baseball.