CBS Sports' coverage from 2-7:15 p.m. ET Sunday, when unheralded Rich Beem beat Tiger Woods by a stroke, had an 8.0 overnight rating, the second-best on record (since 1986).
Only the fourth round in 2000, when Woods went on to win, drew a higher number (10.0).
The final-round overnight rating was 6.4 last year, when Woods wound up tied for 29th, 14 strokes behind winner David Toms.
The two-day average overnight rating of 6.8 was 28 percent better than last year's and second only to 2000's 8.0.
Overnight ratings measure the 53 largest markets in the United States, covering about 65 percent of the country.
'In the past five years, the PGA Championship has established itself alongside the other three majors by producing great ratings,'' CBS Sports president Sean McManus said Monday.