Travis Sawchik is a FiveThirtyEight staff writer. His new book “The MVP Machine: How Baseball’s New Nonconformists Are Using Data to Build Better Players,” co-authored with The Ringer’s Ben Lindbergh, is available this week. In it, they examine how outsiders (and a few forward-thinking insiders) are employing unconventional ideas along with new data from new … Continue reading How Trevor Bauer Remade His Slider — And Changed Baseball