Major League Baseball implemented several rule changes this season that have drastically shortened games, and the league will test several other potential alterations this season in the Atlantic League of Professional Baseball.
The ALPB will experiment with the use of a designated pinch runner, a single disengagement per at-bat for pitchers and the "double-hook" designated hitter rule, as Lindsey Adler of the Wall Street Journal relayed.
Here's a further explanation of each rule:
- Designated pinch runner: "Each club will list a player who is not otherwise in the starting lineup as a designated pinch runner.