In baseball, frauds come in a variety of ways. Sometimes it is a player cheating or throwing a game; other times it is an actual financial fraud that impacts either a player or a team.
Writers even get in on the act and occasionally fool a large number of people as well. Baseball memorabilia is faked constantly because of its value. Players have also lied about their age to be both older and younger.
These are just some of the many types of fraud that have impacted the game since it was created (and the story behind that may also be a fraud as well).