As much as I love Keith Jackson, he is OLD and it shows in the way he was calling games in his last few years.
Let the man watch the game along with the rest of us.
I remember when NBC brought Jim McKay out for the 2002 Winter Olympics in Salt Lake City. He did the pre-recorded intro ok but when they would ask him things during the opening ceremonies live, it was painful to watch.
When it's time to stop, it's time to stop. The older of us may remember Willie Mays trying to play the outfield for the Mets in the WS... Don't ruin the memories.