John Cena admits that age is a 'factor' in WWE retirement WWE legend John Cena, 48, says that age is one of the reasons that he is retiring from wrestling at the end of 2025. 6 August 2025 John Cena is retiring from WWE because he is "not as strong and fast" as he once was. John Cena will retire from WWE at the end of the year The 48-year-old wrestler will bring his legendary career to a close later this year and explained that he wants to step away from the sport before his athleticism declines too significantly. John told People magazine: "Age plays a factor.