The U.S. men's team set a world record in the distance medley relay at IAAF's World Relays meet on Sunday in the Bahamas.
Kyle Merber, Brycen Spratling, Brandon Johnson and Ben Blankenship set a time of 9 minutes, 15.50 seconds, eclipsing Kenya's run of 9:15.56 in 2006.
Kenya was second in Sunday's race, 1.7 seconds behind.
The distance medley relay is composed of legs of 1,200, 400, 800 and 1,600 metres for a total of 10 laps, or 4,000 metres.
The Americans won an extra $50,000 for setting the record.
Usain Bolt did not run Sunday's 4x200 metre relay final won by the Jamaicans in 1:20.97. The U.S. team was disqualified after problems with the baton exchange.
Bolt and his teammates were second to the U.S. in Saturday's 4x100 final.
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