From the little ball board...

[Rich]

Originally Posted by IRISHMAFIA

However, the original question did not concern the appeal, but the ability for a retired runner to return and touch a missed base.

Sure. I don't see how this is really possible. The runner is out and no longer a runner, but a retired runner. I wouldn't allow the runner to return, but would uphold an appeal. Just cause the defense put him out doesn't mean they should be put at a disadvantage. If the runner was safe at second, the defense could appeal and the run wouldn't score, after all.