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How did Baseball Prospectus FanGraphs and The Hardball Times help develop sabermetric analysts?

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Websites such as Baseball Prospectus, FanGraphs, and The Hardball Times served as critical training grounds for the next generation of sabermetricians. Following the commercial success of the book Moneyball, major league teams began a concerted effort to hire analysts who had honed their skills by writing for these numbers-oriented platforms.1

These websites provided a public forum where analysts could develop and refine their methods for parsing complex data. This experience became increasingly valuable as professional teams gained access to massive datasets from tracking systems like Sportvision, which recorded detailed game movements. By providing a space for rigorous statistical inquiry, these outlets helped prepare a pool of talent that front offices later recruited to manage the "arms race" of data analysis that transformed Major League Baseball operations.1