San Francisco was on top of the sports world last weekend. On Sunday, Oct. 28, the Giants beat the Tigers 4-3 in 10 innings, completing a sweep for the World Series.

The next day, on national television, the 49ers dominated the Cardinals 24-3 on “Monday Night Football.”

Heading into their bye, the 49ers are 6-2, with a two-game lead in the NFC West and appear to be primed to win the division for the second year in a row. The Niners were our preseason pick to win the Super Bowl, and have looked like a contender at times this season.

Should San Francisco win Super Bowl XLVII, it would be a historic year for the City by the Bay, and it would mark only the fifth time in 47 years that one city hosted the current World Series and Super Bowl champions at the same time.

Here’s a look back at the four times a team has won the World Series in October, and the football team from that city went on to win the Super Bowl a few months later.

1. 2004 / New England Patriots and Boston Red Sox — It didn’t cure the curse, but Boston Red Sox fans could at least take solace in the fact that their football team had won two of the previous three Super Bowls heading into the 2004 season. That special year in Beantown, though, saw the Red Sox’s World Series drought finally come to an end. To add insult to injury to the New York fans who couldn’t stand to put up with Red Sox fans finally having the upper hand, months after bringing a World Series to Boston, the Patriots won their second Super Bowl in a row, beating the Eagles, 24-21. They didn’t need a historic comeback — as the Red Sox had accomplished in coming back from a 3-0 deficit to beat the hated Yankees in a seven-game A.L.C.S. — as they won their two playoff games by 17 points and 14 points, respectively, before the Super Bowl win.