Tiger woods only had one ball left.
The story goes that Tiger Woods took 3 balls out of his bag to practice putting in his hotel room and forgot to put them back.
Tiger's resumption of the 2nd round that morning started on the 13th hole. As caddy, Steve Williams, put his hand in the bag he noticed there were only 3 balls - they still had 6 holes to play.
On his second shot out of the rough on the 13th hole Tiger damaged his ball with the sand wedge. Walking off the green he threw the ball to a young boy in the crowd. Two balls left.
On the 18th hole, teeing off with driver, Tiger hit his first shot in the water.
At this point in time only caddy Steve Williams knew there was only one ball left. He suggested Tiger hit an iron for his 2nd tee shot but Tiger again took driver and this time hit the fairway.
Steve Williams said later in an interview that he never had been that nervous in his whole life.
With no balls left, Tiger Woods would have been disqualified from the tournament.
Tiger Woods ended up winning his first U.S. Open by a record-setting fifteen strokes over runners-up Ernie Els and Miguel Ángel Jiménez.
Steve Williams only told Tiger Woods there was one ball left on Day 2 after he had won the Championship.
Wikipedia: 2000 U.S. Open (golf)
Updated: 1-May-2020 | Email feedback to this question