Omaha, Neb. ? Michael Phelps will get another shot at Mark Spitz’s Olympic record in Beijing.

Phelps locked up his eight-race schedule by winning the 100-meter butterfly at the U.S. swimming trials Saturday night, powering away on the return lap to easily beat world-record holder Ian Crocker. The winning time was 50.89 seconds, about a half-second slower than Crocker’s 3-year-old mark of 50.40.

Spitz won seven golds at the 1972 Games; Phelps six golds and two bronzes in 2004.

“This week turned out how I wanted it to,” Phelps said. “I’m ready for the challenge that lies ahead of me. At the Olympics, it’s going to be harder than it was here. It’s a higher level. And you add the relays in there, and it’s the Olympic Games. Hopefully, it’s something I can be successful at.”

Although Phelps had to be content with setting two world records in Omaha, Margaret Hoelzer put her name in the book with a stunning victory in the 200 backstroke.

The 25-year-old had a great surge off the wall heading into her third lap, then closed strong to finish in 2:06.09, beating the record of 2:06.39 set by Zimbabwe’s Kirsty Coventry in February. It was the ninth world record of the meet.

Fifteen-year-old Elizabeth Beisel rallied to take the second Olympic spot in 2:06.92. Hayley McGregory finished third again, matching her finish in the 100 back and costing her a berth on the Beijing team.

Gary Hall won’t get a chance to go for his third straight Olympic gold in the 50 freestyle. The 33-year-old swimmer wore a red, white and blue cape and used his hands as six-shooters, hoping to take down his younger rivals in his only event of the trials.

But Garrett Weber-Gale touched first in an American record of 21.47, while Ben Wildman-Tobriner took the second Olympic spot in 21.65. Cullen Jones, who set the previous U.S. mark of 21.59 in Friday’s preliminaries, was third in 21.81, while Hall settled for fourth in 21.91.