Catcher interference on the rise
Defensive (catcher's) Interference – UmpireBible – The Blog
Luis_Robert
Glossary of baseball terms - Wikipedia
Can or should a catcher throw to second if the first base runner steals on ball four? - Quora
Rules – Pleasant Hill Baseball Association
What happens when an umpire interferes with a catcher's throw to a base? - Quora
What is the reason for the rule in Baseball that allows a batter to attempt first base if the catcher doesn't catch a third strike? - Quora
Milwaukee
What is the reason for the rule in Baseball that allows a batter to attempt first base if the catcher doesn't catch a third strike? - Quora
On Deck Sports 2013 Summer/Fall Catalog by Clipper Magazine - Issuu