How many world title fights did Muhammad Ali box in under his original name of Cassius Clay?

Clay/Ali fought in only one professional title fight as Cassius Clay. February 25, 1964 Clay beat Sonny Liston (Liston quit on his stool due to a shoulder injury in the 7th Rd)to become the World Heavyweight Champion. He then changed his name to "Muhammad X" and then Muhammad Ali before his rematch with Liston on May 25, 1964 (Ali won this fight with a 1st Rd KO).