Originally Posted by Dan Lobb
The "US Pro" was unaccredited between 1952 and 1962.
The Kramer organization held the official rights to the US Pro title after 1959, but did not exercise its rights until 1963, owing to the absence of Gonzales in 1960 and 1962, and Hoad in 1961.
In these years it wasn't called US Pro, but World Pro (at least since 1954).
It was surely a first class tournament on some editions (1952, and from 1954 to 1957), while others had depleted fields (1953, and from 1958 to 1962).
Of the eight victories Gonzales had there, only four can be considered effective Majors.