List of Philadelphia and Kansas City Athletics Opening Day starting pitchers - Wikipedia
Origin of the Modern Pitching Win – Society for American Baseball Research
Lefty Grove - Cooperstown Expert
How to increase velocity with pitching in baseball - Quora
Oakland Athletics: Most Up-to-Date Encyclopedia, News & Reviews
The Philadelphia Athletics Complete A “Double Triple Steal”!
Oakland Athletics - Wikipedia
Each MLB Franchise's Best Squad That Didn't Win a World Series, News, Scores, Highlights, Stats, and Rumors
Bill Shores – Society for American Baseball Research
Major League Baseball Season Recap 1930 - This Day In Baseball
Those Crazy Nineteenth Century Baseball Rules