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Tim Lincecum's nickname is one of the most fitting in sports. He really is a freak.
The prototypical right-handed pitcher is a tall power arm, normally a guy that is 6'4" with a smooth delivery.
Lincecum is generously listed at 5'11". The crazy number is that he only weighs 165 pounds. That's why it is such a shock that he can throw upper 90s heat.
Tim is the perfect physics problem for college students. How does a tiny guy like that put that much force behind the ball? The answer is simply torque. Lincecum is incredibly flexible, and his stride while pitching is around seven feet long. That is a full foot more than his height. Using so much of his body, Lincecum generates a ton of momentum and can use more of his body to add to the power of his pitch.
It would be cool to see a guy the size of Randy Johnson with Lincecum's windup. More height and weight could generate more power and maybe rival a certain lefty to be named later's velocity.
As it stands, Tiny Timmy has racked up two Cy Youngs and a World Series victory, so his résumé is bigger than he is.