Golf Course. The amateur with the lowest combined 3-day score is the champion and receives a prize in the form of gift certificates redeemable at the local golf course pro shops. Professional tournament The main events of the Waterloo Open are the Professional and Senior Professional golf tournaments. 192 professionals compete in a one-day qualifying "shoot-out" on Saturday at Irv Warren Golf Course. After Saturday's round, a cut is made and the top 60 golfers in the Open division, as well as the top 20 golfers in the senior division, play a second round on Sunday for the championship. Because of the Waterloo Open's relatively large top prize compared to other tournaments of its size ($40,000 to the golfer who wins in 2008) and its reputation as one of the most well-run and hospitable tournaments among professional golfers, it attracts many up-and-coming young golfers from all over the country. Golfers who have competed in the Waterloo Open include current PGA professionals Zach Johnson, Woody Austin, Tom Lehman, and George McNeill. Winners External links Official site Golf in Iowa Recurring sporting events established in 1934 1934 establishments in Iowa