PositiveThe Washington PostIf I have one criticism of Passan’s book, it is that he scrimps on the history of pitchers’ arms. More historical context, pre-UCL, would have been not only helpful but surely interesting, too ... By so throughly presenting a serious study of the arm — or more precisely, the elbow — Passan has written an important book. For arms, if there is Tommy John surgery, maybe we now also have Jeff Passan education.