Passan does a deep on “Tommy John” surgery of the elbow. This includes the actual anatomy of the arm as well as the alarming increase in the procedure done for players of all ages. One is left with the conclusion that presently, given the emphasis on throwing velocity the greatest hope is that research will reveal ways of providing preventative health of the elbow and monitoring when a pitcher’s arm is structurally beginning to fail. He is highly critical of year-round baseball for Americans in youth programs and Japanese baseball’s regimen of constant throwing and practice. He is strangely selective on which scam artists he vilifies. He is extremely critical of “Perfect Game” which holds tournaments and exhibitions for MLB. (If it is so bad for future pitchers, why do teams support it with regular attendance of their scouts). He is also strangely whimsical about Tommy John III, a chiropractor who shoots electricity into the elbow. One suspects that since his dad cooperated with the book.John III is now an outspoken anti-vaxxer.  Passan does a great job investigating the mental stress of athlete patients during their rehab. He embedded himself with individuals and tracked their progress.  In one instance he digressed at length about a player negotiation that had virtually nothing to do with “the arm.” While he extols their determination of the pair of two-time Tommy John recipients,  he also unintentionally reveals how utterly self-centered they are. This is enhanced by depicting their spouses as doting, selfless, baby producing “baseball wives.” (Gag). I also did not care for the narrator of this book, but that was more a matter of personal taste. Overall, I am not sorry I listened to the entire book but was hoping it would end soon after about two-thirds of the way through.