San Francisco Mayor Gavin Newsom throws his hat in - literally - supporting the SF Giants in the NL Championship Series against the Phillies. He tweeted today: "Made a wager w PHL Mayor @Michael_Nutter on the NLCS! Loser wears winning team cap at upcoming events to support our veterans. Go @sfgiants!" via @GavinNewsom Philadelphia mayor Michael Nutter tweeted back that it's on: "@GavinNewsom I accept your challenge. Go #Phillies!" via Michael_Nutter Last week for the Giants game against the Atlanta Braves, Newsom made a bet with Atlanta mayor Kasim Reed that loser flies the winner's flag above City Hall....the Giants flag is on its way to Atlanta. Go Giants!