LONDON — Tyler Clary of the United States passed defending champion Ryan Lochte on the last lap and set an Olympic record to win the 200-meter backstroke at the London Games on Thursday.

Clary clocked 1 minute, 53.41 seconds to improve on the previous mark of 1:53.94 set by Lochte at the 2008 Beijing Games in a now-banned bodysuit.

Ryosuke Irie of Japan touched in 1:53.78 to take the silver medal and Lochte finished in 1:53.94 for bronze.