Jeff Passan, ESPNMar 21, 2024, 10:00 AM ETCloseESPN MLB insiderAuthor of “The Arm: Inside the Billion-Dollar Mystery of the Most Valuable Commodity in Sports”IN THE IMMEDIATE aftermath of the Zoom call Monday night that threw the Major League Baseball Players Association into chaos, a veteran player, stunned at the mutiny that had unfolded in front of him, thought to himself, “What the f— was that?” Over nearly three hours, he said, he had witnessed years of pent-up frustration from player leaders unleashed on MLBPA leadership. And one moment at the end of the meeting burned itself into…