Justin Williams said Sunday he didn’t have the puck he shot into the net for his 200th career goal. Anze Kopitar, whose assist on Williams’ goal Saturday was his 500th point, wasn’t available to talk because the Kings had an optional practice Sunday. Kings media relations czar Jeff Moeller also didn’t know who took possession of the potential keepsake. Moeller said someone on the Kings’ staff ends up with all the pucks that end up in the opponents’ nets at Staples Center. The whereabouts of this one remained a mystery as of Sunday afternoon, however.