The strike-zone box, which has become as vital to baseball broadcasts as the first-down line is to football broadcasts, will remain on the screen but no longer will indicate whether a pitch was a ball or a strike. (In addition to showing the pitch speed and type, the box previously marked a strike with a filled-in circle and a ball with a hollow circle. Home viewers might never have noticed.)
The change was made because that box now will be used for the ABS system, and MLB is doing everything it can to ensure no one can exploit it. In fact, the box will be shown in just one place in the ballpark: the broadcast booth.