They already did introduce replays: https://en.wikipedia.org/wiki/Instant_replay_in_Major_League_Baseball https://en.wikipedia.org/wiki/Instant_replay_in_Major

They already did introduce replays: https://en.wikipedia.org/wiki/Instant_replay_in_Major_League_Baseball https://en.wikipedia.org/wiki/Instant_replay_in_Major_League... But replays weren’t allowed for balls and strikes, the subject of the new system.