This tutorial will cover how to open specific ports for programs, or to open these ports globally using Zone Alarm.

In other words, the system could place a pitch that was one-tenth inside the strike zone four-tenths of an inch outside the strike zone. The likely outcomes, MLB officials say, are not that extreme.

Major League Baseball will experiment with the strike zone challenge system at the game's highest level next year during spring training. Commissioner Rob Manfred confirmed the news on Monday ...