Kansas City's 10-0 win Tuesday earned an 8.1 rating and 13 share on Fox. That's down 28 per cent from the previous low, an 11.3 for last year's Game 6 between Boston and St. Louis when the Red Sox clinched the title.
The rating peaked with a 9.5/15 from 9-9:30 p.m. EDT as the Royals built a big lead then fell from there.
The 8.1 was the highest of the series, with a chance for a much bigger number for Wednesday night's Game 7.
Ratings represent the percentage of homes with televisions tuned to a program. Shares measure the percentage of households with TVs in use at the time.