Youth sport leaders must not ignore the influence parents have on creating a positive developmental experience for young athletes. Therefore, expectations involving parental involvement and conduct must be addressed prior to athletes' participation. This article aims to examine the importance of creating mandatory parental training programs for youth sports. It explores research regarding what parents should learn, how to implement training programs, and how to hold parents accountable. Requiring parental training could be an important step toward changing the often negative sideline culture that has become prevalent in youth sports today.