From wiki:
This would appear to say that it would be perfectly legal for a fielder to purposely drop a fly ball with a runner at first, and then throw out the lead runner at second, thus benefiting the team in the field? Presumably, the batter has run to first, so there'd be no double play.Since the purpose is to prevent double plays, the rule applies only when there are fewer than two outs, and there is a force play at third base (i.e., there are runners at first and second base, or the bases are loaded).