For the first time in 95 MLB All-Star Games, a ball or strike might not be called by a human umpire. For tonight's MLB All-Star Game, MLB will utilize the Automated Ball-Strike (ABS) Challenge System, which will give pitchers, hitters and catchers an opportunity to instantly challenge an umpire's pitch call.

The ABS uses sensors and cameras to determine if a pitch should be called a ball or a strike. Each team will be given two challenges, and teams will be allowed to retain a challenge if their appeal is successful.

RELATED STORY | Robot umpires are getting their first MLB test during spring training

This won't be players' first experience with the ABS system. The ABS was used during MLB Spring Training earlier this year. Also, younger players likely used the system as it has been i

See Full Page