Complex sentence: In 2000, Irwin said that the greatest disappointment of his career was not in the British Open, but at the 1984 U.S. Open at Winged Foot, where he had led after the first three rounds, but shot a final round of 79 to finish 6th.
Split into simpler sentences: In 2000, Irwin said that the greatest disappointment of his career was not in the British Open, but at the 1984 U.S. Open at Winged Foot. Irwin had led after the first three rounds, but shot a final round of 79 to finish 6th.