Joe Girardi theorized if a manager’s got a beef, he could throw a little challenge flag. Oh, brother. It’s as laughable as using lasers to call balls and strikes, and don’t think that hasn’t been suggested before.
Baseball long ago opened the door to replay when it allowed reviews of whether a ball is a home run, including whether it is fair or foul. So it’s not a big leap to allow replay of, oh, I don’t know, PLAYS THAT DECIDE GAMES, like this one.