Andy Pettitte – Society for American Baseball Research

Why don't MLB pitchers mix in a few slow pitches from time to time to throw off batters? - Quora

Obituary: Paul Pettit (1931-2020) – RIP Baseball

Andy Pettitte - Baseball Stats - The Baseball Cube

Baseball 2002's winners and losers

Baseball-Reference.com - 10 years ago today, Andy Pettitte ended retirement after one year, signing a minor league contract with the New York Yankees.

Why everybody should vote Andy Pettitte into the Hall of Fame - ESPN

Andy Pettitte PSA AutographFacts℠

Andy Pettitte Net Worth

Italian Americans At Bat: From Sandlots to the Major Leagues by Mary Steiner - Issuu

SABR - The Society for American Baseball Research

USA Baseball Expands Online Coaching Education Resources

Beltrán, Lackey lead 14 newcomers on Baseball Hall ballot

Derek Jeter – Society for American Baseball Research