What prevented Ben Hogan from attempting to complete the Grand Slam of golf by winning the US PGA Championship in 1953?

The PGA Championship overlapped the Open.

More about Ben Hogan

Having won the Masters, the US Open Championship at Oakmont Country Club and the Open at Carnoustie, he was unable to compete in the US PGA Championship as the PGA Championship overlapped the Open.

The US PGA Championship was conducted from July 1 to July 7 and the Open ran from July 6 to July 10. Unbelievable but true.

Hogan often declined to play in the PGA Championship and skipped it more often as his career wore on.

One of the reasons was that the PGA Championship was, until 1958, a match play event, and Hogan's particular skill was "shooting a number". He was meticulously planning and executing a strategy to achieve a score for a round on a particular course.

Another reason was that the PGA required several days of 36 holes per day competition, and after his 1949 car accident, Hogan struggled to manage more than 18 holes a day.