Cindy McCain, the widow of the late Sen. John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE (R-Ariz.), will serve as honorary captain for the Arizona Cardinals at the team's home opener on Sunday.

"We are pleased & privileged to announce that Cindy McCain will serve as our honorary captain for Sunday’s regular season opener vs. Washington," the NFL team tweeted on Friday.

We are pleased & privileged to announce that Cindy McCain will serve as our honorary captain for Sunday’s regular season opener vs. Washington. #InTheArena pic.twitter.com/LeRLGOR9rB — Arizona Cardinals (@AZCardinals) September 7, 2018

The announcement comes almost two weeks after the longtime senator and 2008 presidential nominee died at the age of 81 from an aggressive form of brain cancer.

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Cardinals wide receiver Larry Fitzgerald spoke at one of the memorial services for McCain.

"He didn't judge individuals based on the color of their skin, their gender, their backgrounds, their political affiliations or their bank accounts," Fitzgerald said. "He evaluated them on the merits of their character & the countenance of their hearts."

Cindy McCain wrote in a USA Today op-ed on Friday that Americans can honor her husband's legacy by taking action in their own lives.

“This was the essence of John McCain’s message to our nation: that we must join together, shaped by our deepest values of liberty, equal justice and respect for the dignity of all people, hardened by unwavering courage and integrity, and step into the arena to fight for a greater cause,” she wrote, adding that it “is now up to us — all of us — to get into the arena and fight."

"We can lead, we can support, we can contribute, we can donate — but we must do something,” she added.

Former Sen. Jon Kyl (R) was appointed by Arizona Gov. Doug Ducey (R) to fill McCain's seat in the Senate.