The enthusiasm for the home team spilled out. Mayor Eric Garcetti, in his Kings jersey and holding a beer can, dropped the F-Bomb on live TV.
Garcetti stood at the microphone on the Staples Center ice and told the crowd about rules politicians should not break.
"They say never, ever be pictured with a drink in your hand and never swear, but this is a big (expletive) day," Garcetti said, drawing a roar from the crowd and laughs and applause from the Kings players.
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Just to show that the off-color language was no mistake, the mayor's office then posted on Twitter, "There are a few rules in politics, one is never swear, but this is a #BFD."
Following the mayor at the microphone, former player and now Kings president of business operations Luc Robitaille poked fun at Garcetti, saying, "Well, we told our players not to cuss. Thanks."
Quest 4 the Cup: Kings v. Rangers
The rally was being televised live on Fox Sports West, and a commentator apologized to viewers after the network failed to censor the offending word.
The Kings clinched the Stanley Cup on Friday when they beat the New York Rangers, 3-2, at home in a historic double overtime victory against the New York Rangers.
Garcetti said he was looking forward hearing New York Mayor Bill DeBlasio sing "I Love LA," on "Jimmy Kimmel Live" after the East Coast mayor lost a Stanley Cup bet.