In this thread about a year ago, it was established pretty clearly that a slot in the batting order is assigned to a player, not his position. (i.e., if two players swap positions on the field, they do not also swap spots in the batting order)
In that same thread, the double-switch was discussed as a way to (sort of) get around this. Since my question involves a subtle point regarding this, let me set the stage carefully.
Say I’m Bob Brenly, and I managing my Diamondbacks in a game at home. Here’s my starting lineup/batting order:
1. SS Womack
2. 2B Counsell
3. LF Gonzalez
4. 3B Williams
5. CF Finley
6. RF Bautista
7. 1B Grace
8. C Miller
9. P Schilling
As I understand it, here’s a typical double-switch: Going into the bottom of the 7th, Curt Schilling is due to lead off. He’s getting tired, and I’m planning on pulling him anyway and replacing him with Byung-Hyun Kim. Turns out that Mark Grace is having an off night, and I want to replace him with Erubiel Durazo at the same time.
Rather than sending Kim out to lead off in the 7th, I send Durazo out in the 9th position. The instant I do that, Schilling has been subbed for, and is out of the game. If the order gets around to position 7 in that inning, Kim bats there (subbing for Grace). If it doesn’t, the team takes the field in the top of the 8th with Kim pitching and Durazo on 1st. In stepping on the field, Kim subs for Grace and takes the 7th slot in the batting order. This may lead to one less pitcher at-bat during the game, and hence has some potential benefit.
Now, for my question.
Suppose I perform a double substitution going into the top of an inning. Same starting lineup, but at the end of the 7th Tony Womack and Damian Miller both come down with acute food poisoning or something, and I have to replace them both. Rod Barajas takes the field at catcher, while Jay Bell lines up at shortstop.
As I understand it, there’s no reason to assume or require that Barajas will automatically bat 8th (for Miller), and Bell 1st (for Womack). Do I have to tell the umpire now which one will take which batting order slot? Or can I wait until we’re at bat and P1 or P8 comes up, choosing then?