SEASIDE, Calif. — Corey Prugh of Spokane and Jeff Coston of Blaine kept themselves in the all-important top 20 after the third round of the PGA Professional National Championship at Bayonet and Black Horse Golf Courses.

Prugh shot a 73 Tuesday and finished in a five-way tie for sixth at 1 under, while Coston's 74 put him in a tie for 13th with seven other golfers at 1 over.

Prugh, the 2011 Pacific Northwest PGA player of the year, birdied three of the first five holes to finish at 1-over on the day.

The 56-year-old Coston, a nine-time Pacific Northwest PGA player of the year, will try to avoid dropping any spots on the final day, as the top 20 finishers will earn spots in August's PGA Championship at Kiawah Island in South Carolina.

Leader Matt Dobyns had a hole-in-one to increase his edge to six strokes.

The winner also will receive $75,000 and six PGA Tour exemptions over a 12-month period.

Haase leads at Rainier

Megan Haase of Spokane took the lead after the first round of the Washington State Women's Amateur Championship at Rainier Golf and Country Club. Her 1-under 72 gave her a two-stroke lead over Karinn Dickinson of Mukilteo and Mallory Kent of Tukwila.

Yasue Alkins of Lacey held a one shot lead in the Senior Women's Amateur, held concurrently at Rainier.

From wire and event reports