Cubs Vs. Dodgers: Cubs will win in 3. Errant bolts of lightning directed at various Cubs fan favorites will mysteriously take out dodgers players standing where cubs players had been standing seconds earlier. The Cubs will win by default after only twenty four hours of mysterious and accidental yet calamitous occurences to Dodger players who go within 1 mile of cubs players.
Phillies vs. Brewers: Phillies win in 4. Because having CC Sabathia in your lineup only wins you one game.
Angels vs. Red Sox. Angels Win in 4. Angels are amazing. They haven't had to care in almost a month. The Red Sox are going to be crashing from the adrenaline high of barely edging out the wild card.
White Sox vs. Tampa Bay. White Sox win in 3. This is the first time the Rays have ever made it to the playoffs. The fact that people actually care about them enough to watch them play will cause them to feel nervous. The prospect of Tropicana field having a sellout crowd will cause massive heart attacks among the Rays.
NLCS and ALCS
Cubs vs. Phillies. Cubs win in 4. For the same reasons the Cubs won previously in the NLDS
White Sox vs. Angels. White Sox win in 5. Obviously this isn't a serious prediction thing, but a Chicago world series would be amazing.
World Series
Cubs will beat the White Sox in 4, but no one will be able to testify that they actually did, as Wrigley field's normal human vrowd will be entirely replaced with billy goats. The Cubs won't take any chances.