Alex Rodriguez, who’s arguably the greatest player of his generation, has done a poor job of maintaining a clean reputation. After admitting to steroid use, receiving the nickname “A-Fraud” from his teammates, cheating on his wife, and enduring the perception that he’s “unclutch,” he’s made things even worse by participating in illegal high-stakes poker games. Of course, plenty of athletes have tarnished their reputations and careers due to their penchants for gambling. Conspiracy theorists, for example, like to claim...