According to an article published in the Arizona Daily Star on February 23, 2006:
[It] began as the Tucson Open in 1945 at El Rio Golf Course. The tournament was founded by Hall of Fame professional golfer Leo Diegel. In the early 1940s, Diegel — then head pro at El Rio — convinced PGA Tour commissioner Fred Corcoran that Tucson was big enough to support a pro event. Diegel's discussions coincided with the financial collapse of the El Paso Open, and in January 1945, Tucson was inserted into El Paso's spot, making it the third stop on tour.
Tucson Open Winners and Runners-Up at El Rio
*won in playoff
|  The Tucson PGA event is referred to here as the "Tucson Open", its original name. This event, however, has had many different names over the years:
As of 2007, the Accenture World Match Play Championship is now held in Tucson, featuring the top 64 ranked players in the world. This important and exciting event focuses the golf world's attention on Tucson.