John Cena, a 17-time World Champion, will conclude his 23-year WWE career today with his final match against Gunther at "WWE Saturday Night's Main Event" in Washington, D.C.The event, streaming live on Peacock from Capital One Arena, follows a recent SmackDown tribute where Tom Brady, Eli Manning, and Snoop Dogg, among others, praised Cena's impact inside and outside the ring.Cena confirmed he would close the star-studded show, which also features matches like the Undisputed WWE Champion versus NXT Champion Oba Femi and WWE Tag Team Champions AJ Styles and Dragon Lee competing.