My favorite comedy podcast, Uhh Yeah Dude, sometimes features a game called "Weed, Horse, Mind's Eye." One co-host lists three names. One is a kind of marijuana, one is the name of a race horse, and one is a figment of his imagination. Another co-host has to guess which is which.
This game, inspired by that podcast, is called "Baseball Nickname, Serial Killer, or Fakery." It works the same way. There will be sets of three, each with one of the three categories. The link to each will give you the answer. Don't click if it if you don't want to know. Good luck: