Correct call. The appeal is a force. When the 3rd out is a force, no runs can score.
Coaches, teach your runners to miss the next base, not the forced too base, then it's a timing play.
Consider this one from J/R;
1 out. R1, R2.
Batter hits a gapper.
R1 and R2 score, R1 missed 2nd, BR tagged out on a close play going into 3rd (2nd out).
Defense then appeals R1 missed 2nd, out, that's 3.
And the 3rd out was R1 who was forced at 2nd.
3rd out is a force, no runs can score.
Here's one you'd like to be able to call in from your car.
Bottom of the last, home team down a run. Crack, might be a triple...then, the above..
"Ah, hang on coach, this is a sticky one, me and my partner are gonna consult the book on this one. We GOTTA be right on this one here, hang on".
Oh, and please, give me the scorekeepers cell # (in fact, get it yourself).. should, ah, er, uh, my UIC have any question/s on this crucial ruling.
Be sure and look serious and show plenty of hustle.. getting to your car, er, ah, I mean rule book.
As you turn to run, announce over your shoulder, (as your dialing 911), "I'm getting my UIC on right now..."
CENCOM: What is your emergency?
Ump: A large explosion is about to occur!! Unless YOU!!, call this number in exactly 10 minutes!! AND, give this special code: "Visitor 1 home 0, ball game!! Do you have it exactly? Read it back. Okay, please, the clock is ticking.