Softball Guide: Pitching Tips, ASA Rules and Tryout Drills

Softball pitching tips for slowpitch and fastpitch focus on wrist flick and windmill techniques. Understanding the latest ASA rules on obstruction and substitutions is critical for competitive league play.

Runner Sliding Home as Catcher Grabs Softball

ASA Softball Rules on Obstruction

Published Jul,08 2011 | By Kim Nunley

The Amateur Softball Association of American sets the universal rules for softball in the United States. According to their official rule book, obstruction is when a defensive player affects or prevents a batter from swinging at a pitched ball or hinders the progress of a runner.

Kim Nunley has been screenwriting and working as an online health and fitness writer since 2005. She’s had multiple short screenplays produced and her feature scripts have placed at the Austin Film Festival. Prior to writing full-time, she worked as a strength coach, athletic coach and college instructor. She holds a master's degree in kinesiology from California State University, Fullerton.