This video from
this July 8, 2000 Yankees-Mets game shows Rob Cook umpiring first base, where he calls obstruction on Todd Zeile. This was game 1 of a double header. Joe Buck and Tim McCarver both call him Doug Eddings in the video. However, Eddings did not work game 1, but did umpire home plate in game 2, possibly causing this confusion. Cook is listed as the first base umpire in the boxscore, so I would assume this is him.