According to Ben Walker and Ronald Blum of the Associated Press, MLB and the MLBUA have agreed to a five-year collective bargaining agreement, pending ratification by both sides. Folded into this agreement is umpire cooperation in the development of an Automated Ball/Strike System (ABS).
ABS uses Doppler radar to locate the ball in relation to the strike zone and relay the information to the home plate umpire using an iPhone and an earpiece. Home plate umpires would still be needed for check swings, foul tips, or bounced pitches. It was first used at the Atlantic League All-Star Game and then the Arizona Fall League.