Baseball is an intricate game with plenty of unique characteristics, and Major League Baseball has many rules, regulations and standards governing its on-field practices.

Players must adhere to these rules or else face on-field penalties imposed by the umpires and, occasionally, off-field disciplinary measures.

Rule changes for the 2020 season can be found here.

In this section, you will find explanations of Major League Baseball's rules.

The following are all of the terms defined within this section: