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Destroying the Kinetic Chain

Destroying the Kinetic Chain

Learn how the kinetic chain generates power in fastpitch softball and why proper energy transfer is essential for velocity.
Guillermo Patterer 07 jul. 2026
Internal Rotation vs. Hello Elbow: Understanding the Differences

Internal Rotation vs. Hello Elbow: Understanding the Differences

Exploring the two major fastpitch pitching models and what the science says about them.
Guillermo Patterer 12 jun. 2026
Is Pitching a Lateral Linear Action?

Is Pitching a Lateral Linear Action?

Versión en español aquí. When we say “you learn something new every day,” it may sound cliché or overused, but it’s overwhelmingly true. If in the United States — with all the access they have to information, research, and technology — there is still debate between two different pitching models, then
Guillermo Patterer 15 may. 2026
Analyzing Lyndsey Grein's Mechanics

Analyzing Lyndsey Grein's Mechanics

Versión en español disponible aquí In recent days, my students showed me videos of this pitcher from the University of Oregon (go Ducks!) who plays in Division I, the highest level of NCAA college softball. Her radar gun readings show an interesting velocity: 63–67 mph. Moreover, she boasts excellent
Guillermo Patterer 08 may. 2026

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