Beginnings

Niklas Edin participated in as many as ten different sports simultaneously before he took up curling.^[10] He started curling in 1999, inspired in part by the Swedish women's team skipped by Elisabet Gustafson when they secured the bronze medal at the 1998 Winter Olympics.^[10] Five years later in 2004, Edin skipped his own team to a World Junior Curling Championship title for Sweden, defeating the team skipped by Stefan Rindlisbacher for Switzerland. The following year, Edin was selected as the alternate for the silver medal-winning Swedish team skipped by Nils Carlsén at the World Junior Curling Championships. Edin also skipped a new team in 2005 to a silver medal at the European Mixed Curling Championships, together with future longtime teammate Sebastian Kraupp. In 2006, Edin won a second silver medal at the World Junior Curling Championships, this time playing third for Team Carlsén. The team also qualified for the 2006 World Men's Curling Championship, finishing in fifth place.

Over the next two years, Edin proved his skills with a variety of teams on an international level. In 2007, Edin skipped a new team, playing this time with his future teammates in the senior division Fredrik Lindberg and Kristian Lindström at the World Junior Championships, winning his third silver junior championship medal. In 2008, Edin also skipped yet another team to the bronze medal at the 2008 European Mixed Curling Championships, with Anna Hasselborg playing third. In 2007 and 2008, Edin joined up with Team Scotland to represent Sweden in the Contintental Cup and was the only participant from Sweden in 2007. As Sweden has participated in the Cup every other year, Edin's 2007 appearance has ensured that Sweden is the only European country to appear in every Continental Cup.

Team Edin I (2008–2014)

In the spring of 2008, Edin moved to Karlstad along with Sebastian Kraupp, Fredrik Lindberg, and Viktor Kjäll to form a new team, choosing the Karlstad Curling Club as their curling home.^[11] Together, the new team filled the void in Swedish men's curling left by the retirement of Peja Lindholm and quickly became seen in Sweden as the team most likely to have success on the international curling circuit. In 2009, Team Edin won Sweden's Elite Series as well as the Swedish National Championship.^[12] The team also represented Sweden at the Winter Universiade and won the gold medal. That same season, Team Sweden, led by Mattias Mabergs, finished in 8th place at the 2008 European Curling Championships and fell short in two of three tight games against Finland in the relegation challenge for the 2009 World Men's Curling Championship. No Swedish team, therefore, could compete at the world championships that year.

In the 2009–2010 season, Team Edin was considered the frontrunner for Sweden's national team.^[13] In December 2009, the team won the gold medal at the 2009 European Curling Championships, their first appearance at the championship. During the 2010 Elite Series, however, they lost a tough final to their closest rivals, Team Carlsén, by the score of 6–5.^[14] Team Carlsén was selected for the 2010 World Men's Curling Championship but underperformed with a 4–7 loss. Team Edin was selected to participate in the 2010 Winter Olympics. They barely missed the medal platform, placing fourth and losing the bronze medal game to Switzerland. They also cemented their status over their closest rivals Team Carlsén by winning the Swedish Curling Championships.^[12]

Team Edin's 2010–11 season continued to advance their status as the top team in Sweden by winning Sweden's Elite Series championships.^[15] On the World Curling Tour, the team also started strongly by winning the Oslo Cup and making the finals of the Baden Masters. At the 2010 European Curling Championships, the team was unable to secure a playoff spot but made up for this by winning a bronze medal at the 2011 World Men's Curling Championship. On the World Curling Tour, Team Edin also made it to two Grand Slam quarterfinals – the Masters and the National – as well as the Perth Masters semifinals.^[16] The team ended their season by becoming the first non-Canadian team to make it to a men's Grand Slam final at the 2011 Players' Championship, losing in the final to Team Kevin Martin.

Edin's rink continued its success into the 2011–12 season. The season became their best year at the Grand Slams, reaching the playoffs in three slams, including the semifinals of the Masters and Canadian Open and the quarterfinals at the National. They also successfully defended their title at the Oslo Cup and repeated their Elite Series title win.^[12] In the international curling championships, they first won a silver medal at the 2011 European Curling Championships after losing in the final to Norway's Thomas Ulsrud. Later that season, the team won its second bronze medal at the 2012 World Men's Curling Championship. Edin played three games through severe pain with significant injuries, requiring the team to be reshuffled with Sebastian Kraupp skipping for the team, Fredrik Lindberg moving up to the third position, and Oskar Eriksson curling in the second position through the bronze medal game.

The 2012–13 season became Edin's best season up until that point in time. Nationally, they won a third straight Elite Series title.^[12] Internationally, they only reached one Grand Slam playoff - the quarterfinal at the National. They also, however, won their third straight Oslo Cup and the Victoria Curling Classic. Their biggest success came by peaking when it counted in the international championships, taking two important gold medals in the same season. The first came at the 2012 European Curling Championships, where they beat Team Ulsrud in the final. The team then won the 2013 World Curling Championship, giving Edin his first world championship gold medal. It was also the first time since 2004 that a Swedish men's curling team had won a world championship title.^[17]

The 2013–14 season was not as successful for the Edin rink, becoming their first without any title. They achieved their best success reaching the semifinals of the Shorty Jenkins Classic, beating Kevin Martin in the quarterfinals. Unfortunately, the team reached the playoffs of only one Grand Slam, finishing in the quarterfinals of the Masters, along with the quarterfinals of the Baden Masters and Cactus Pheasant Classic. The team also finished with a disappointing 5th place at the 2013 European Curling Championships. At the 2014 Winter Olympics, Sweden finished in first place after the round-robin, with an 8–1 record but lost a tight match to the Great Britain team skipped by David Murdoch in the semi-final. Following this defeat, the team defeated China's Liu Rui to win the bronze medal, giving Edin the first Olympic medal of his career.

The last months of the 2013–14 season signaled the eventual end of what was then known as Team Edin. Because the team had increased their international travel and the time spent in Canada to become more competitive, they had to skip the Swedish Curling Championships and withdrew from the Elite Series, despite leading the series before the finals.^[18] The Swedish Curling Federation then chose the team led by Oskar Eriksson to represent Sweden at the 2014 World Men's Curling Championship, with Eriksson skipping a team including future Team Edin members Christoffer Sundgren and Kristian Lindström. The choice of Team Eriksson reflected that they had success on the World Curling Tour and were competitive with Team Edin, but they also won the Swedish Men's Curling Championships and lost a close final in the Elite Series, coming in second place. The team lived up to expectations by winning the silver World Championship medal. This also meant, however, that Team Edin was unable to defend their 2013 championship win. Instead, the team finished the season reaching the semifinals of the Pomeroy Inn & Suites Prairie Showdown,^[19] followed by a disappointing sixth-place finish at the European Masters.^[20] At the end of the season, the team formally announced that they were disbanding, with Niklas Edin eager to continue, but with Sebastian Kraupp and Fredrik Lindberg concerned about their ability to train and compete as necessary to reach the top of the World Curling Tour rankings while focusing on their future careers.^[21]

Team Edin II (2014–2016)

In May 2014, Edin and Team Eriksson agreed to form a new Team Edin, with Edin skipping the team in the fourth position, Oskar Eriksson playing third, Kristian Lindström at second, and Christoffer Sundgren as lead.^[22] The new team immediately saw their increased potential and aimed to become the number one team in the world.^[22] The 2014–15 season indeed became a golden year for the new Team Edin, as the team first won the gold medal at the 2014 European Curling Championships. Edin skipped Team Sweden to a perfect 11–0 record to win the European Championship, defeating Norway's Team Ulsrud in the final game, giving Edin his third European Championship gold. Team Edin then capped off the season by winning the World Championship gold medal at the 2015 Ford World Men's Curling Championship. While the team lost three round-robin games, they rallied in the playoffs defeating Finland, Canada, and then their Norwegian rivals again to pick up the championship. The victory meant that Edin and Eriksson held the gold medals at the European and World Championships for the second time in a single curling season. That season, the team also reached their second career Grand Slam final, losing in the inaugural Elite 10 event.

During the 2015–16 curling season, Team Edin picked up their second straight European Curling Championship gold medal when they won the 2015 European Curling Championships, this time defeating Switzerland's Peter de Cruz in the final. The team found less success at that season's World Championships, placing sixth. The team became increasingly competitive, however, at the Grand Slams, reaching the playoffs in the Masters, the Canadian Open, Players' Championship, and the Champions Cup. The team also won the Baden Masters, reached the finals of the European Masters, and finished in third place at the Karuizawa International,^[23] as well as the German Masters.^[24] At the end of the season, Lindström was forced to take a break from curling, requiring a shoulder operation and needing recovery.^[25]

Team Edin III (2016–present)

Mixed events

Despite his participation in mixed events early in his curling career, Edin had until recently primarily played mixed doubles and mixed team curling at the Continental Cup. After the addition of Mixed Doubles in the 2018 Olympics, however, Edin began to participate in mixed doubles events, in part reflecting the Swedish Curling Association's recognition that Team Sweden might more likely earn a place in the Mixed Doubles Olympic competition by permitting curlers on men's and women's national teams to vie for a chance to compete in Mixed Doubles at the World Mixed Doubles Curling Championship. As a result, Edin began to participate in the Swedish Mixed Doubles Curling Championships, placing 4th in 2019,^[45] but missing the playoffs in 2020.^[46] He also teamed up with Rachel Homan for the inaugural mixed doubles event at the 2018 WCT Arctic Cup, and the duo won the event.^[47]

In the 2020–21 season, the Swedish Curling Association launched a substantial effort to support five teams on the mixed doubles tour in order to prepare for the 2021 World Mixed Doubles Curling Championship and to secure an entry for Team Sweden to compete in mixed doubles at the 2022 Olympics. Edin was selected for one of the teams, partnering with Emma Sjödin of Team Sundberg for the 2020–21 curling season. In their inaugural event, the Oberstdorf International Mixed Doubles Cup, Sjödin and Edin reached the semifinals, losing to Sjödin's teammate Johanna Heldin and Team Edin alternate Daniel Magnusson.^[48] Sjödin and Edin won their next mixed doubles event, the 2020 WCT Tallinn Mixed Doubles International, defeating the tournament frontrunners Jayne Stirling and Fraser Kingan in the final.^[49]