Last night I watched Lincecum rack up twelve strikeouts with ease. There was no stress on his part. Even during the World Series he looked completely calm. After reading this article, I was surprised at just how much went into Lincecum's surreal pitching. Its part extreme athleticism, height, and skill:
One key to Lincecum's delivery is to keep his left side, especially his left shoulder, aimed toward his target for as long as possible. "Don't open up too soon because then you lose leverage," Tim says. "If you twist a rubber band against itself, the recoil is bigger. The more torque I can come up with, the better."
"My dad always told me to sit down on my back leg as long as I could and push off as much as I could. I'm trying to get as much out of my body as possible. I've got to use my ankles, my legs, my hips, my back.... That's why I'm so contorted and it looks like I'm giving it full effort when it's not exactly full effort."
As for the "step-over" move near the end of his stride, Lincecum explains, "That's from my hips. I'm getting everything toward the target, and my hips want to go. My hips can't just go and open up. I'm trying to create torque. That's when everything kind of explodes. My body comes, and [my arm] is just kind of along for the ride."
[ How Tiny Tim Became A Pitching Giant - SI.com ]