MLB fans will unconditionally support their teams, but let's be honest: You don't love every player the same. All 30 clubs, in fact, employ an individual that their supporters would rather see at the bottom of McCovey Cove.
Loathing is usually rooted in on-field struggles, though the context can vary. Of course, there are players who always underachieve in the majors yet continue to receive opportunities. On the other hand, we've seen plenty of veteran free agents sign with a new team and inexplicably experience difficulties.
Oft-injured players can drive a fanbase insane. Moreover, spectators will turn against anyone who disrupts clubhouse chemistry.
Whether a team is slumping or contending, there's a player that its fans want to dismiss.