[Dakota]

Originally posted by booker227
I believe that in the first situation you have an illegal player, who, since she was a courtesy runner in the same inning, doesn't have a legal right to that position. If discovered and protessted after one pitch or one play, the penalty is disqualification of the offending player and she is replaced by a substitute player or the starter.
The second situation is an unreported substitute who is disqualified, all outs stand, and all players are returned to their original bases.
As you can see, the penalty inforcement is different.
Now that's what I believe, but I can be wrong.

Make sure you are looking at the rule covering an offensive player who has completed her turn at bat, reached base safely and the protest is made before the next pitch. (The US / IP is declared out in that situation.)