Lawrie's career was transformed in 1999. After winning the Qatar Masters, which is a European Tour event, early in the season, he went on to win the 1999 Open Championship at Carnoustie in July. This was the Open where the Frenchman Jean van de Velde blew a three-shot lead on the final hole. Lawrie won a four-hole playoff against Van de Velde and American Justin Leonard. An unusual aspect of Lawrie's victory was that he was neither leader nor co-leader at any time during his regulation 72 holes, only moving into a share of the lead when the leaders came back to him after he had completed his final round. Also, Lawrie came back from the largest third-round deficit ever faced by a major championship winner; going into the final day, he trailed the leader, Van de Velde, by 10 shots. This is also the record for the biggest final-round comeback on the PGA Tour.