re: This announcer wants to make the 3d game of a series 7 innings.

Wrong! It was just a suggestion to consider in speeding up the game. He wasn't advocating it, just brain storming.
The season was over, the game had no meaning, and they were running out of things to talk about. They were discussing ways to speed up the games and keep baseball entertaining to the fans. Did you notice the stadium was about empty.