[yawetag]

This happened a few years ago, and I'm sure it was discussed. However, I think it would be a good discussion today.

Batter hits fly ball to deep outfield. Initially, umpires rule in-play and runner gets a single. A pinch runner is brought in and the umpires then decide to review the play (obviously before another pitch is thrown, but after the pinch runner replaces the batter). The review overturns the in-play and changes to a HR.

The OC then asks for the original batter to be placed back in the lineup, claiming he wouldn't have put in the pinch runner had it been a home run originally.

As an umpire, what do you do?