Nico Young broke the American record in the men’s outdoor 5000m to win at a Diamond League meet in Oslo on Thursday.

Young, a 22-year-old who placed 12th in the Olympic 10,000m, clocked 12 minutes, 45.27 seconds.

Grant Fisher, the Olympic 5000m and 10,000m bronze medalist, held the previous American record of 12:46.96, set in 2022.

Young’s previous outdoor 5000m personal best was 13:11.30 from 2022, which put him outside the 30 fastest Americans in history going into Thursday.

Young also ran 12:51.56 indoors on March 2, ranking him fifth all-time worldwide and second among Americans indoors behind Fisher’s world record of 12:44.09.

Young became the third American man to win a 5000m on the Diamond League, an annual series of track and field meets that launched in 2010. The others were Ben True in 2015 and Paul Chelimo in 2018.

Young earned his first career win outside of the U.S. His first race outside the country was at the Paris Olympics, according to track and field statistics website Tilastopaja.info. Oslo marked his Diamond League debut.

Uganda’s Joshua Cheptegei owns the outdoor world record of 12:35.36, recorded in 2020.

Also Thursday, Norwegian Karsten Warholm ran the fastest time in history in the 300m hurdles — 32.67 seconds to beat his previous record of 33.05.

Warholm is the Tokyo Olympic gold medalist and world record holder in the 400m hurdles.

The 300m hurdles is not contested at major meets like the Olympics and World Championships.