Uh oh:
6.08
The batter becomes a runner and is entitled to first base without liability to be put out (provided he advances to and touches first base) when --
(d) A fair ball touches an umpire or a runner on fair territory before touching a fielder.
If a fair ball touches an umpire after having passed a fielder other than the pitcher, or having touched a fielder, including the pitcher, the ball is in play.