R3 (Dodger Andre Ethier), R2 (Juan Pierre), 1 out. Line drive headed for center snagged by pitcher D'back Dan Haren. Runners running. Pitcher throws to F4 (Felipe Lopez), who instead of tagging base casually walks up to R2 and tags him, but not until after R3 crosses the plate without tagging up. D'backs leave the field, blowing their chance for an advantageous fourth out. OC talks to PU Larry Vanover, who says yeah, that's a run.
Best part was that R2 Juan Pierre was looking homeward, as if to make sure that R3 tagged home before F4 Felipe Lopez tagged him.
Here's the mlb.com link, with video.
Dodgers get run on 'fourth-out rule' | MLB.com: News