McLamore was an employee and also a businessman before. Edgerton originally opened Insta Burger King in Miami, Florida on March 1, 1954. Three months later, on June 1, he met McLamore and they formed the Burger King Corporation. The corporation opened Burger King stores and went on to introduce the Whopper burger in 1957, when it also dropped "Insta" from the name. The pair sold the business to Pillsbury in 1967 and McLamore served as Burger King's president until 1970, and was chairman to 1976.
McLamore died of cancer in Coral Gables, Florida on August 9, 1996, at the age of 70.