The race was a different matter.

In another major breaststroke upset, Scott Weltz won the 200 meters at the US Olympic swimming trials Friday night, leaving Hansen and Shanteau with only one individual event at the London Games.

On a night when Ryan Lochte and Michael Phelps were focused on getting through semifinal races, Nathan Adrian won the 100 freestyle and Cullen Jones claimed the second spot for London, while Natalie Coughlin barely survived her last chance to make it back to the Olympics.

The men’s 200 breaststroke was just as shocking as the women’s 100 breast, which was won by Breeja Larson over Rebecca Soni and Jessica Hardy. At least Soni got second place, still good enough for a do-over in the Olympics.

Neither Hansen nor Shanteau were as fortunate.

‘‘My whole body was kind of tingling and I was like, ‘I’m feeling it and something is different, this is the time,’ ’’ Weltz said. ‘‘I was smiling behind the blocks, I wasn’t nervous. I felt great going into it.’’

Clark Burckle claimed the second spot on the Olympic team, another big surprise. Shanteau finished third and Hansen faded to fourth, which means they’ll have to settle for only swimming the 100 breast in London after going 1-2 in that event at the trials.

‘‘I think you guys are as surprised as I am,’’ Hansen said. ‘‘I can’t believe Eric and I are not swimming the 200.’’

The 25-year-old Weltz moved up on the third lap and surged to the finish to win in 2 minutes, 9.01 seconds. Burckle was next in 2:09.97, edging Shanteau with the touch.

Hansen finished in 2:10.25.

Adrian was a big favorite in the 100 free, and this race went as expected. The 23-year-old native of Washington led at the flip and never let up on the return lap, winning clearly in 48.10, the fourth-fastest time in the world this year.

The real battle was for the second individual spot. Jones went out strong, as always, and managed to hold on in an outside lane to touch in 48.46, giving the first African-American to win an Olympic swimming gold a chance to add to his collection in London.