Complex sentence: His career took a further leap forward, when he won The International in Castle Rock, Colorado, in 2002, then two weeks later won the PGA Championship at Hazeltine National, one of golf's four major tournaments.
Split into simpler sentences: His career took a further leap forward in 2002 with a victory at the The International in Castle Rock, Colorado. Two weeks later he won the PGA Championship at Hazeltine National, one of golf's four major tournaments.