Pedersen first started in the World Cup in Heerenveen in November 2009 . There he finished 16th over 5000 m in Division B. The following month he took third place in the team pursuit in Calgary, his first podium in the World Cup. At the 2010 Junior World Championships in Moscow , he won gold in the all-around competition. The following season he reached second places in the team pursuit in Berlin and Moscow. At the Junior World Championships in 2011 in Seinäjoki , he won silver in the all-around competition. He won gold over 1500 m, 5000 m and in four-way combat. The following year he won the gold medal at the Junior World Championships in Obihiro in all- around, four-way, over 1500 m and over 5000 m. At the beginning of the 2012/13 season he came on the podium in Heerenveen for the first time in an individual. There he took third place over 1500 m. This was followed by nine top ten placements in ten other individual World Cup competitions during the season. He also achieved third place in the team pursuit at the World Cup in Astana and finished the season in eighth place in the World Cup over 1500 m and sixth place in the World Cup over 5000/10000 m. At the 2014 Winter Olympics in Sochi , he finished eighth over 1500 m and fifth over 5000 m and in the all-around competition.
At the beginning of the 2014/15 season , Pedersen won his first World Cup victory over 1500 m in Seoul . In the further course of the season he took second place four times and third place three times in the World Cup. At the all- around world championships in 2015 in Calgary he won the bronze medal and at the individual distance world championships in 2015 in Heerenveen he finished 11th over 1500 m and 5000 m and fourth over 10000 m. He finished the season in the overall World Cup in third place and in the World Cup over 1500 m and in the World Cup over 5000/10000 m in second place. In the 2015/16 season he achieved 11 top ten placements in the individual world cup, including second place in Inzell over 5000 m and third place over 5000 m and second place over 1500 m in Heerenveen, fifth place in the world cup over 1500 m and third place in the World Cup over 5000/10000 m. He also came second in the team pursuit in Inzell and twice in Heerenveen. With that he achieved fifth place in the 1500 m World Cup at the end of the season. In February 2016 he won bronze over 5000 m and silver in the team pursuit at the individual distance world championships in Kolomna . The following month he won the silver medal at the all- around world championship in Berlin . After finishing second in the team pursuit in Harbin at the beginning of the 2016/17 season, he won the team pursuit in Heerenveen and came third in the 1500 m and second in the team pursuit in Stavanger . At the 2017 World Single Distance Championships in Gangwon , he won the bronze medal in the team pursuit. In addition, he came in 14th place over 1500 m and sixth place over 5000 m. At the beginning of March 2017 he was fourth in the four-way combat at the all- around world championship in Hamar . In the 2017/18 season he triumphed in Stavanger over 1500 m and in Erfurt over 5000 m. He also took third place over 5000 m and second place in the team pursuit in Heerenveen, third place in the team pursuit in Calgary and second place over 1500 m in Erfurt. At the highlight of the season, the Winter Olympics in Pyeongchang in February 2018 , he won bronze in the 5000 m and gold in the team pursuit. In the 1500 m run he came in ninth place. In March 2018 he won the silver medal at the all- around world championship in Amsterdam . At the World Cup finals in Minsk he won over 1500 m, 5000 m and in the team pursuit and finished the season in third place in the overall World Cup and in second place in the World Cup over 1500 m and in the World Cup over 5000/10000 m
In the 2018/19 season, Pedersen took second place twice and third place in the team pursuit. Over 5000 m he came second in Tomakomai and first place in Hamar and thus reached third place in the overall World Cup over 5000 / 10,000 m. At the all-around European championship in January 2019 in Klobenstein , he won the bronze medal in the four-way fight. At the individual distance world championships in 2019 in Inzell , he won the silver medal in the 1500 m and the team pursuit and the gold medal in the 5000 m. In early March 2019, she won the silver medal at the 2019 All Around World Championships in Calgary .
Pedersen was six times Norwegian champion in the 5000 m (2014-2019), four times in the 1500 m (2015, 2016, 2018, 2019), three times in the four-wheeler (2017, 2018, 2019) and once in the 10000 m (2018).
Personal bests
500 m 35.82 sec. (installed on March 2, 2019 in Calgary)
1000 m 1: 09.31 min. (installed on November 14, 2015 in Calgary)
1500 m 1: 42.39 min. (installed on March 10, 2019 in Salt Lake City)
3000 m 3: 34.66 min. (installed on November 7, 2015 in Calgary)
5000 m 6: 07.16 min. (set up on February 7, 2019 in Inzell)
10,000 m 12: 56.91 min. (installed on March 3, 2019 in Calgary)
Participation in World Championships and Olympic Winter Games
Olympic games
2014 Sochi : 5th place team pursuit, 5th place 5000 m, 8th place 1500 m
2018 Pyeongchang : 1st place team pursuit, 3rd place 5000 m, 9th place 1500 m
Individual distance world championships
2011 Inzell : 5th place team pursuit, 15th place 1500 m
2012 Heerenveen : 5th place team pursuit, 15th place 1500 m, 17th place 5000 m
2013 Sochi : 5th place team pursuit, 5th place 1500 m, 7th place 5000 m
2015 Heerenveen : 4th place 10000 m, 11th place 1500 m, 11th place 5000 m
2016 Kolomna : 2nd place team pursuit, 3rd place 5000 m, 14th place mass start
2017 Gangwon : 3rd place team pursuit, 6th place 5000 m, 14th place 1500 m
2019 Inzell : 1st place 5000 m, 2nd place team pursuit, 2nd place 1500 m
2020 Salt Lake City : 4th place 5000 m, 7th place team pursuit, 10th place 1500 m