Coming off his breakthrough victory two weeks ago in Ohio, the 54-year-old Sauers played the four par-5 holes in 5 under with the eagle and three birdies. He won three times on the PGA Tour.
Triplett had five- and four-hole birdie streaks at TPC Snoqualmie Ridge. Also 54, he followed a bogey on the 11th - his second hole of the day - with five straight birdies and added a birdie on 18. On his second nine, he bogeyed the third, then ran off four in a row.
Triplett won the American Family Insurance Championship in June in Wisconsin for his fifth victory on the 50-and-over tour.
Waldorf also had five straight birdies, from the 15th to the first. He won the season-opening event in Hawaii for his second senior title after winning four times in the PGA Tour.
Ames played the final six holes in 6 under. He birdied 13 and 14, eagled the par-5 15th and birdied 16 and 18. A naturalized Canadian citizen from Trinidad & Tobago, he's winless in 36 starts on the 50-and-over tour after winning four times on the PGA Tour.
John Daly had a 71. He has three top-20 finishes in 10 PGA Tour Champions starts since turning 50, with the best a tie for 11th last month in the Dick's Sporting Goods Open in New York. Last week, he tied for 51st in the regular European Tour's Czech Masters.
Andrade had a 74.
Local favorite Fred Couples is sidelined by back problems.