Randy Orton wrestled WWE world champions.
Randy Orton . Orton is a 13-time world champion . Orton has held the WWE Championship nine times ( eighth reign was as WWE World Heavyweight Champion ) and WWE 's World Heavyweight Championship four times , and was the final holder of the World Heavyweight Championship , which he unified with the WWE Championship to become the WWE World Heavyweight Champion . At age 24 , he became the youngest world champion in WWE history after he won the World Heavyweight Championship . After Rated-RKO disbanded in mid-2007 , Orton gained two WWE Championship reigns in one night , when at 27 he became the youngest two-time WWE Champion .