Sunday’s US Open Championship coverage on TSN raked in some record-breaking audience levels for the sportscaster.

The national average audience for the first four rounds hit 361,000 viewers, a 43% boost over last year’s overall average of 253,000 viewers. It’s a 6% increase over the previous high of 341,000 in 2000.

The fourth round coverage attracted 700,000 viewers, the highest US Open final round numbers in TSN’s history. Audience levels were up 26% compared to last year and up 19% over the previous high in 2005.

The Sunday telecast peaked at one million viewers during the last hour and a half of play, as Tiger Woods tied Rocco Mediate with a 12-foot birdie putt on the 18th green.

On Monday, the celeb golfer won his third US Open trophy. The playoff round of the US Open had a national average audience of 349,000 viewers from noon to 2 pm ET (TSN’s coverage ended at 2 pm as it had EURO games starting at that time).