An anonymous reader writes: The St. Louis Cardinals have been one of the better baseball teams over the past several years. The Houston Astros have been one of the worst. Nevertheless, there is evidence that officials for the Cardinals broke into a network maintained by the Astros in order to gain access to "internal discussions about trades, proprietary statistics, and scouting reports." The FBI is now leading an investigation into the breach, and they have served subpoenas to the Cardinals and to Major League Baseball demanding access to electronic correspondence. It's the first known instance of corporate espionage involving a network breach in professional sports. Law enforcement said the intrusion "did not appear to be sophisticated." It seems likely that a personal vendetta against the Astros's general manager is involved.