Unhittable: How Technology, Mavericks, and Innovators Engineered Baseball's New Era of Pitching Dominance
By Rob Friedman
Harper; hardcover, 288 pages; $32.00
Rob Friedman is the creator of PitchingNinja, as he identifies himself on social media. He is a pitching analyst for ESPN's Sunday Night Baseball, ESPN College Baseball and Major League Baseball. He also has written for Fox Sports and given pregame analysis on Apple TV.

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