As Tiger Woods approaches his 50th birthday, SI Golf will count down the biggest moments—the highs and the lows—of his career. We begin with Nos. 50-41.

Technically, this is true. The two-year swing overhaul under the supervision of coach Butch Harmon led to the greatest stretch of golf in history. Between August 1999 and June 2002, Woods won 7 of 11 majors, as close to golf perfection as anyone has ever come.