ANAHEIM, Calif. -- The all-California Classic opened with the lowest overnight ratings for a prime-time World Series Game 1. But it still was by far the night's most-watched show.

Fox Sports' telecast of the San Francisco Giants' 4-3 victory over the Anaheim Angels on Saturday drew an 11.2 rating.

That means 11.2 percent of TV homes in the country's largest markets tuned in. It's a drop of 5 percent from Game 1 of last year's World Series between the Arizona Diamondbacks and New York Yankees, which had an 11.8 overnight rating on Fox.

The 2000 opener of the Subway Series between the Yankees and Mets, also on Fox, produced a 14 overnight rating. That series wound up having the lowest average national ratings in baseball history, 12.4.

The good news for Fox: The 11.0 rating during prime time for Giants-Angels beat the 6.5 for CBS, the 4.2 for NBC, and the 3.8 for ABC.

Fox is paying $2.5 billion for TV rights to postseason baseball from 2001-06. The ratings for the AL and NL championship series were the highest in three years.

Overnight ratings measure the 55 largest TV markets in the United States, covering nearly 70 percent of the country. Each overnight rating point represents about 735,000 TV homes.

Saturday night's broadcast peaked with an 11.7 rating from 9-10 p.m. ET. San Francisco had the highest big-market rating, with 30.9 percent of TV homes there tuned in, followed by Los Angeles at 26.9.

Not surprisingly, the game's appeal was much lower in New York (9.9 overnight rating) and Chicago (9.4).

The national rating is expected Tuesday.