[2] On February 10, 1959, he appeared as a mystery contestant on the television quiz show To Tell the Truth, where he was described as holding the “grand slam” of junior tennis titles in France, England, Australia and the United States.

Buchholz was an original member of Lamar Hunt's Handsome Eight, a group of players signed by in 1968 for the newly formed professional World Championship Tennis.

In 1985, Buchholz founded the Lipton International Players Championships (now known as the Miami Open), which is a leading event on both the men's and women's tours.

Buchholz helped create Altenis, a management company which oversees tennis tournaments in Latin America.

In 1992, Buchholz teamed with Arthur Ashe to found the Good Life Mentoring Program, benefiting hundreds of elementary and middle school children in the greater Miami area.