Beane’s assistant general manager and a Harvard-educated economist who implements sabermetrics for the A’s. With no prior Major League Baseball experience, he utilizes his statistical expertise to identify undervalued players.

A pioneering statistician whose work laid the groundwork for sabermetrics, influencing the approach taken by the Oakland A’s. Although not affiliated with the team, his analysis challenged traditional baseball wisdom.

A catcher drafted by the Oakland A’s in 2002, representing the team's unconventional player-selection strategy. Despite being overlooked by other teams, his college performance and high on-base percentage made him valuable to the A’s.