I don't have a dog in the fight but given La Russa's history if there really was an issue don't you think he'd raise more of a stink?
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No, that's not his style. He has been berated many times for his passive approach in situations like this. He may walk out on the field, but he will walk back without a fight. After The White Rat days of the 80's, we know the difference between a passive and agressive coach for sure.
For some reason I keep recalling an absolute meltdown from La Russa in the clubhouse - I believe he was berating an A's beat writer who had called in question the manhood of GM Sandy Alderson (who served two tours in Vietnam).