The End for Mariano Rivera?
New York Yankees: Mariano Rivera was nearly traded. Here's why - Sports Illustrated
Closer (baseball) - Wikipedia
Mariano Rivera threw out the first pitch before ALDS Game 4 and, naturally, it was a cutter
The Divine Pitch - Guideposts
Fame hasn't changed Yankees' Mariano Rivera
Rivera legacy forged by success, failure
Mariano Rivera: A Singular Pitcher - The New York Times
Sport Science analyzes Yankees' closer Mariano Rivera - ESPN The Magazine - ESPN
Mariano Rivera Cutter: The Mechanics of His Signature Pitch
Mariano Rivera Teaches 3 Important Pitching Tips