Three scenarios from this season

[youngump]

Originally Posted by MD Longhorn

The enormous point the last two posts are missing...

Interference is an IMMEDIATE dead ball.

The only question in a situation like the OP is... where IS the ball (not where will it be) at the moment it play is dead. If over fair territory, it's fair. If over foul territory, it's foul. Everything that happens after the moment the interference occurred is irrelevant.

I'm certainly not missing that point. I just don't think it's super relevant to the discussion. If the ball is foul at the time of the interference then I think everybody agrees that we just have a foul ball (possibly with an out if it is still in the air).
The key question here is when is the BR out. I say they are out at the moment the ball gains status. Irish says the BR is out when they hit the ball. If he's right, then when the BR interferes with a fielder (while the ball is fair), we have interference by a retired runner and a double play.
If I'm right, then when the BR interferes, she is not yet retired and we only get a single out.
If the interference had been with the ball, there is a rule that implies only take one out. But it's silent for a fielder. But it seems to me the rules should treat those two situations the same.