Joe Torre says he's "pretty hopeful" of having expanded video review by umpires in the major leagues next season.
The MLB executive vice president spoke about replay on Sunday before the Los Angeles Dodgers hosted the Atlanta Braves in Game 3 of the NL division series.
Torre said the system isn't ready yet, but that it's getting closer to reality.
Managers would be allowed one challenge over the first six innings of a game and two from the seventh inning until conclusion.
Balls and strikes would not be reviewable, and challenged calls would be settled at MLB headquarters in New York after replays are viewed.