In a 2008 college game, Buster Posey hit a grand slam, played all nine positions, and struck out two batters from the mound. This deep dive analyzes the physiological traits, cognitive processing speed, and psychology that made him redefine the toughest position in sports, force MLB to rewrite its rulebook, and rise from franchise cornerstone to front-office mastermind.

A 3.94 GPA high schooler and elite shortstop, Posey moved behind the plate at Florida State and mastered its immense cognitive load. He won a World Series as a rookie, survived a home-plate collision that changed the rules, rebuilt his swing after ankle reconstruction, and eventually joined the Giants ownership group before running baseball operations.

• He won the 2010 NL Rookie of the Year and caught every inning of the Giants' championship run
• A violent 2 ...