[greymule]

blueump, possibly there's some confusion because in OBR, a fielder cannot make an immediate appeal by simply tagging the base and appealing to the umpire, despite a literal wording of the book. As long as the runner is "in the vicinity" of the base (I'm not sure if there are any other criteria), he has to be tagged. Thus, in the MLB play, the umpire did not acknowledge the appeal until the runner was tagged. Had the runner been advancing toward 2B, the defense could simply have tagged 1B.

Other codes (eg, Fed) may be different in this regard. In ASA softball, for example, an immediate appeal is recognized (and in certain situations that could make a difference as to whether a run scores).