[greymule]

ASA Case Book, Play 8.6-53:

R1 on 3B, R2 on 2B, R3 on 1B, two outs, B4 hits a home run over the left field fence. After the ball is dead on the home run, B4 passes R3, who was holding up thinking the ball might be caught. Ruling: B4 should be called out the instant he passes R3. If any runners had scored prior to the out called on B4, they would count. This does not apply to the super, all men's major and all men's class A divisions. (8-6H; 8-8D; 5-5)

P.S. You might be wondering why they inserted "after the ball is dead on the home run," since it doesn't appear to make any difference. I believe that stipulation allows them to exclude super, men's major, and men's class A, for in those divisions, if B4 passes R3 while the ball is live (i.e., still in the air), B4 is out instantly and only runners who crossed home before the out would score. However, as soon as the ball is dead, the runs count and there can be no passing runners, missed bases, etc.

Why they specified "left field" fence, I don't know.