Is The Cutter The Twins' New Market Inefficiency? - Twinkie Town
Cutting the Fastball
What causes a four-seam fastball to move so much differently than a two-seam fastball? - Quora
Is fastball mania putting young baseball arms on the brink?
Making the cut: 'Tsunami' Martinez rides his wave, revived pitch and Bader's homer to 3-0 victory
SKLZ Pitch Training Softball
Old Doc, New Tricks
How to Throw a Cutter - A Detailed Guide
Types of Pitches
How the cutter grip can affect arm strength
How do baseball hitters determine what pitch is coming as the ball is pitched, such as fastball or breaking ball? - Quora
Cutting the Fastball