As a kid, did you ever envision doomsday scenarios? You know, asteroids hit your city, aliens invade, Godzilla attacks. It's human nature to ponder the worst-case scenario.
Of course, I'm sure that GMs across Major League Baseball have these scenarios in their minds. Maybe Ken Williams is scared of Disco Demolition Round 2 in Chicago. Maybe Brian Sabean is scared that Brian Wilson will shave his beard.
But the worst nightmare of each team is a pivotal player getting hurt. So, true to the nature of humans, I will look at the worst-case scenario for each team.