[Zuben Elgenubi]

Good question. According to The Masters Website, under "Number of Attempts before first Victory" (halfway down the page), there have been three first-time winners: Horton Smith (1934), Gene Sarazen (1935) and Fuzzy Zoeller. Of course, Horton Smith was the inaugural winner.

 Number of Attempts

Before First Victory

1, Horton Smith, 1934

1, Gene Sarazen, 1935

1, Fuzzy Zoeller, 1979

[Moonman62]

Of course, Horton Smith was the inaugural winner.

And Sarazen won the second Masters. I'd say it's one of the toughest accomplishments in golf to win as a rookie (the course requires an incredible amount of local knowledge, not to mention the pressure of a Major). Thanks for the info.

[jessduntno]

This was interesting;

Lowest Career Scoring Average, 100 or More Rounds

71.98 - Jack Nicklaus
72.20 - Tom Watson
72.89 - Raymond Floyd
72.90 - Gene Littler