[6] In 1928 he won his first singles title at the Pacific Coast Championships defeating Bobby Seller in the final.

[8] In 1930 he won his final title at the Mid-Pacific Championships in Hawaii against Jiro Sato of Japan.

Holman played his final singles tournament at the California State Championships where he exited the event in the semi-finals.

In 1932, while he was working at the University of Cincinnati medical school, he paired with Reuben A. Holden III (a former intercollegiate single champion from Yale University) to reach the men's doubles finals at the Cincinnati tournament.

Following his retirement from tennis he later became a notable surgeon who pioneered the first heart lung transplant, and died in New York City on December 10, 1993, at the age of 86, survived by his second wife, physician Constance Friess Holman.