Wishbone states that "they never show my double's face", yet in a previous shot, he says that he (i.e., Soccer, the dog who's usually seen playing Wishbone in the series) is the dog that's facing away from the camera, so the dog that's facing the camera must be Soccer's double.
Carol doesn't actually step on third base while chasing Wishbone around the ball-diamond, so the opposing coaches might have disqualified her home-run because of it. Maybe the idea is that either they didn't notice the mistake, or they wouldn't expect that level of perfection from such a young athlete.