I think experience is a big factor. But here's my reasoning. Not necessary because experience makes you better. Playoff baseball is a completely different animal from regular season baseball. I think pressure is very real, and some players play better and some play worse. The fact that the Cubs won last year at least proves that they can excel at playoff baseball, even granting that luck contributes to a large degree in series that are 5 or 7 games. You have no idea if the Nats are full of a bunch of Clayton Kershaws who underachieve in the playoffs (although I do know that Murphy scares the horsefeathers out of me). You at least know the Cubs aren't. Yeah...I do believe playoff pressure is an actual factor. It's just almost always impossible to tell when it is. There's a few examples that are so glaring that it seems unlikely that it isn't in play...David Price, what happened with the starters in the one game playoffs throwing pure meatballs...Hell, DeRosa admitted the other day that in 08 he felt himself trying too hard and trying to be a hero. 2007 and 2008 Cubs. Sure, its a 6 game sample. But there's a reason for that. They sucked ass for those 6 games.