President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE’s lawyer and former New York City Mayor Rudy Giuliani was loudly booed at Yankee Stadium's Memorial Day game on Monday, his 74th birthday.

After the Yankees' PA announcer said the former GOP presidential candidate was in the stands and wished him a happy birthday, the crowd erupted into boos.

Members of the media quickly took to Twitter to point out the event.

At Yankee stadium: “The Yankees wish a happy birthday to former Mayor Rudy Giuliani.”



Thunderous boos rained across the stadium. — Adrian Carrasquillo (@Carrasquillo) May 28, 2018

Rudy Giuliani was booed at Yankee Stadium on his birthday. https://t.co/p7uAHu4E9I — Kyle Griffin (@kylegriffin1) May 28, 2018

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Giuliani joined Trump’s legal team last month, tasked with dealing with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s Russia investigation.

Since going to the White House, Giuliani has made a strong effort to discredit the Mueller probe, while still maintaining that Trump would welcome a sit-down interview with the special counsel.

On Sunday, Giuliani claimed the entire "basis" of the investigation into Russia's election meddling was "illegitimate."