How can you say mometum is what caused all that? Teams get hot, pitchers get hot, how can you say that its caused by momentum? Being hot, is because the team did their job, its not about momentum. Like you said its all about that next days starter. I'm not saying it caused it. Obviously momentum isn't real. IMO, its a emotion. You have a good play or two - now you start to get excited, you start to believe more, the crowd gets excited, the other team gets rattled, etc. There is no such thing as momentum but IMO opinion it describes a mindset change for the players involved - on both sides. Certainly you believe in crowd noise helping right? That is part of momentum. And it can be shut down very quickly. Like a 3 run homer when you are down 4 in the 9th. No I dont believe crowd noise helps really. Does it probably keep the team more alive, yea, but does it help them get a hit? Throw a strike? Probably not. Ive seen Wrigley loud as hell, only to watch a ball 4 go by and us walk in a run, or us strike out with a runner on 3rd.