Capitol Wrestling Corporation/World Wide Wrestling Federation (1949–1976)

In 1949, Rocca started wrestling in the New York City-area territory for Joseph Raymond "Toots" Mondt, and the Johnston family of promoters, which controlled wrestling at Madison Square Garden, and Mondt owned Rocca's exclusive contract. The territory had been one of the four largest-grossing areas up until the mid-1930s New York, and would later be run by Capitol Wrestling Corporation (CWC, now WWE).

Rocca later formed a tag team with Jose Miguel Pérez in 1957. Together, they captured the NWA World Tag Team Championship, which was the top tag team title used in the CWC, and like so many other titles, was a regional one. They were never defeated after winning this title, but the appellation was abandoned after about five years.

In 1959-60, Rocca worked with Kola Kwariani and under Jack Pfefer, took effective control of the Garden's wrestling office. Kwariani had just broken away from his partnership with Vince McMahon, Sr. Rocca then set the post-World War II record for wrestling-attendance at Madison Square Garden's 49th–50th Street location, drawing 21,950 fans in a singles match against an obscure wrestler named "The Amazing Zuma", also known as "Argentina Zuma", on 2 January 1960, as reported in The New York Times.

This was part of a series of three matches between the two held during a four-month period, when the pair drew, on another night, almost as many fans to the Garden. Rocca had also been provided with new wrestler Bruno Sammartino as a tag team partner. However, when this team failed to sell-out the Garden, the pair was split up to wrestle each other in the hopes that business would pick up, but it did not.

McMahon Sr. eventually took back the New York territory and built it by first featuring "Nature Boy" Buddy Rogers and then, a few years later, the by-then charismatic Sammartino as its champion.

In 1963, the CWC left the NWA when it was renamed the World Wide Wrestling Federation (WWWF). WWE history lists a tournament final to crown the first WWWF World Heavyweight Champion as Buddy Rogers over Rocca on 29 April 1963 in Rio de Janeiro, Brazil, but this tournament is fictitious. Rogers had legitimately held the NWA World Heavyweight Championship, but lost that title to Lou Thesz in Toronto earlier in 1963 in a match – and rematch – ignored by the New York City and Chicago promoters.

After a demotion, and with the arrival of Buddy Rogers as the featured star at the Garden in 1961, within a few years Rocca left the WWWF and briefly set up a competing promotion (supported by Jim Crockett and others) based at the Sunnyside Arena in Queens, New York. In the mid-1970s, he teamed up with Vince McMahon to handle the color commentary on the WWWF's weekly television show. He provided color commentary on WWF Championship Wrestling and All-Star Wrestling from 1972 to 1976,^[6] a role later filled by Sammartino.

Japan and Puerto Rico

Rocca was involved as a professional wrestler, but also as a referee in Japan during the late 1960s and early 1970s. He refereed a number of matches for the Japan Pro Wrestling Association (JWA), and later followed Antonio Inoki to New Japan Pro-Wrestling in 1972.

In 1973, he joined the World Wrestling Council (WWC) in Puerto Rico with partner Miguel Pérez. They captured the defunct WWC North American Tag Team Championship on 11 September 1976 by defeating Los Infernos. They lost the championship to Higo Hamaguchi and Gordon Nelson on 16 October.^[7]