John Cena has a career in WWE.
John Cena . Cena signed a developmental contract with the World Wrestling Federation ( WWF , later renamed to World Wrestling Entertainment , or simply WWE ) in 2001 , debuting on the WWE main roster in 2002 . He has also headlined WWE 's flagship event , WrestleMania , on five different occasions ( WrestleManias 22 , 23 , XXVII , XXVIII , and 29 ) over the course of his career , as well as many others pay-per-view events .