This photo was tweeted out by Matt Helms, City Hall reporter for the Detroit Free Press.
Helms writes in today's Detroit Free Press that Mayor Bing has been trash talking with San Francisco Mayor Ed Lee.
The two have made a wager, writes Helms, "the losing mayor has to visit the other team’s city to participate in a day of service for youth and youth programs."
The odds makers are picking the Detroit Tigers, but the San Francisco Giants are a loose bunch.
They fought off three elimination games on their way to the World Series... twice.
Here's one statistic NPR's Tom Goldman pointed out this morning:
"Three times in the past in World Series when a team that's swept its way into the Series, like Detroit did, played a team that went the full seven games, like the Giants did, the team that went seven won every time."