The MLB Playoffs are here, which means there's plenty of baseball to watch and teams to root for. Inevitably (whether you hate it or love it), there might be a time when a game heads to extra innings.

Major League Baseball's extra innings format is different in the playoffs from the regular season, getting rid of the "ghost runner" starting on second base once a game goes beyond nine innings.

Major League Baseball, like many sports, has done plenty of tinkering with its rules in recent years. One of the most prominent changes - and most controversial - has been the runner on second rule to ...