Östberg, who started for the Falun-Borlänge SK, ran internationally for the first time at the Junior World Ski Championships in 1997 in Canmore . There he took 19th place over 10 km classic and sixth place with the relay. In the following year he achieved 18th place over 30 km classic and 14th place over 10 km freestyle at the Junior World Ski Championships in Pontresina . He had his debut in the World Cup in March 1998 in Falun , which he finished with his brother Mikael in fourth place in the team sprint. At the 1999 Junior World Ski Championships in Saalfelden , he won the silver medal with the relay. In November 1999 he completed his first individual race in the World Cup in Kiruna , which he finished classically in 70th place over 10 km. He ran his first race in the Continental Cup in Orsa in December 2000 and finished 12th over 15 km classic. At the unofficial U23 World Championships in 2002 in Val di Fiemme , he won the gold medal in the 30 km mass start race. In addition, he was there fifth in the sprint and in the skiathlon . At the World Cup in Falun in March 2002, he got his first World Cup points with eighth place in the skiathlon and the day after he achieved his first and only podium finish in the World Cup with second place in the relay. In the 2002/03 season he achieved two placements among the top ten, 41st place in the overall World Cup and 21st place in the Sprint World Cup. In February 2003 he was third in the Wasalauf . At the Nordic World Ski Championships in 2005 in Oberstdorf , he finished 24th in the sprint. At the beginning of the 2005/06 season he achieved his best result in the individual World Cup with fourth place in the sprint in Düsseldorf . In the further course of the season he came in the points five times in World Cup sprints and thus achieved 19th place in the Sprint World Cup. In the 2007/08 season he came in the Scandinavian Cup five times under the top ten, including second place over 15 km classic in Vuokatti and 14 km classic in Jõulumäe and finished second in the overall standings. He completed his last international race in March 2010. He came in fifth in the Wasalauf.
Sweden
