Søren "Bjergsen" Bjerg was born in 1996 in Denmark.
Bjergsen began his professional League of Legends career at a very young age. During the Season 3 European LCS, he was unable to play with his team Copenhagen Wolves until the third week of the spring split due to age restrictions put in place by Riot Games. For the first two weeks, he was temporarily replaced by the team's substitute, cowTard. After he turned 17 years old on February 21st, he was able to rejoin the main lineup and play their remaining LCS matches. At the end of the Spring split, he and the rest of the Copenhagen Wolves starting lineup moved to the organization Ninjas in Pyjamas, where he played in the Summer split.
On November 2nd, 2013, Bjergsen left NiP to move to NA and join the Team SoloMid starting lineup as their mid laner, replacing Reginald and becoming the second player to move from the European LCS to play in the North American LCS after Edward left Gambit to join Curse during Season 3. Bjergsen debuted at the Battle of the Atlantic, where TSM played against Lemondogs. They won their series 2-0, and North America beat Europe in combined score.
On January 23rd, 2014, Bjergsen received a competitive ruling for having violated the LCS rules by approaching and encouraging a contracted LCS player to leave his position at Lemondogs. He admitted to having committed the violation and was fined $2,000.
TSM's spring split went better than their season 3 summer split had, and they ended the round robin with a 22-6 record - just two games behind Cloud9. However, once again they found themselves lacking in the finals of the playoffs, losing to Cloud9 in another 3-0 series. With TheOddOne retiring and Xpecial replaced by Gleeb going into the summer split, TSM struggled early on but started to rebound with the addition of Korean import Lustboy replacing Gleeb. They accomplished what they hadn't been able to since Cloud9's entry to the LCS, and won the playoffs with a 3-2 victory over their rivals.
TSM once again received North America's top seed to the World Championship, and they placed second in their group, behind Star Horn Royal Club and ahead of SK Gaming and Taipei Assassins. It was the first time that TSM with Dyrus had advanced past their initial seeding location at a World Championship, though they lost in the quarterfinals to eventual tournament winners Samsung White.
TSM were the North American team invited to IEM San Jose, the first event that they played with the roster Dyrus, Santorin, Bjergsen, WildTurtle, and Lustboy. They were seeded directly into the semifinals, where they lost 0-2 to Unicorns of Love.
TSM began the 2015 Spring Split with an 8-2 record after five weeks, holding first place during every week after the first. By virtue of their standing after the fifth week of the split, TSM was invited to the IEM Season IX World Championship. There, they defeated Team WE, CJ Entus (marking their first tournament win over a Korean team), and the yoe Flash Wolves to advance to the finals of the event, where they swept Team WE 3-0 to win the title. Though TSM themselves did not play against the GE Tigers at all (then undefeated in the LCK), or against any Korean team in a multi-game series, they still made history by being the first North American team to win an international event with Korean teams present since Chicks Dig ELO at the 2011 World Cyber Games and the first Western team to do so since Gambit Gaming at IEM Katowice in 2013. Bjergsen won the title of MVP for the event.
TSM finished the spring season with a 13-5 record, giving them the top seed into the playoffs. After defeating Team Impulse and then Cloud9, TSM won their third North American championship, tying Cloud9's record of most North American LCS championships won to date. Their victory also gave them the North American seed to the 2015 Mid-Season Invitational, where they looked to replicate their IEM success. However, the team underperformed in the group stage, winning only their match against wild card Beşiktaş and not qualifying for playoffs.
In the summer split of LCS, TSM started relatively strong, sitting at a 8-2 record at the end of week 5. However, they fell to fifth place by week 9, their lowest regular-season placement to date. In the playoffs, TSM beat Gravity Gaming and Team Liquid in the first two rounds, winning both series 3-1. In the finals, held at Madison Square Garden in New York City, they faced off against long-time rivals CLG and lost in a convincing 3-0 series. TSM had already qualified for Worlds after their semifinal win due to their Championship Points from the spring split, and they ended up with the second seed from North America.
TSM were drawn into Group D, which instantly became known as the "Group of Death" or the "Group of TSM's Death" due to LGD Gaming and KT Rolster being favorites to win it; Origen was the last team drawn in. LGD massively underperformed expectations, however, and TSM took a game off them in the first round robin. However, at the same time Origen overperformed, and ultimately KT Rolster and Origen made it out of groups; TSM lost their second game against LGD and ended up in last place with a 1-5 record.
TSM underwent several roster changes during the preseason, and Bjergsen was the only member of the team to stay on the starting line-up. Their eventual roster for IEM San Jose included Hauntzer, Svenskeren, Bjergsen, Doublelift, and kaSing. TSM defeated LGD Gaming but then lost to Origen in the semifinals. After IEM, kaSing departed the team and was replaced by former star Fnatic support YellOwStaR.
TSM's NA LCS season started out rocky, with a 50% winrate for the first three weeks. Regardless, they were invited to IEM Katowice in March. There, they dropped their first game to the Korean Challenger team Ever but recovered in the loser's bracket before losing in the semifinals to eventual tournament winners SK Telecom T1 and finishing tied for third place with Royal Never Give Up. After returning to North America, their rocky season continued, and they finished in sixth place, the lowest they'd ever finished in the history of the LCS, with a huge comeback loss to Echo Fox in the last game. Guaranteed to face first-seed Immortals if they were even able to beat Cloud9 in the quarterfinals, TSM seemed poised to have their lowest playoff result in the history of the LCS as well.
However, after signing the well-known sports psychologist Weldon in the break before playoffs, TSM showed significant improvement as a team. They easily defeated Cloud9 3-1 in the quarterfinals and went on to crush Immortals 3-0 in the semifinals, although a lot of their win over Immortals was blamed on surprising draft picks by their opponents, including a top-lane Lucian in Game 1 and no sign of the heavily-in-meta Ekko from either team. In the finals, TSM faced CLG, a matchup with an even more heated rivalry than normal due to Doublelift's team switch prior to the season's start. Ultimately CLG won 3-2, and TSM finished the split in second place, out of reach of the Mid-Season Invitational.
Support YellOwStaR departed TSM during the mid-season break to return to Fnatic, and after a Korean bootcamp during the mid-season break to try out new support players, TSM signed Dream Team's Biofrost as his replacement. Despite being a LCS rookie, Biofrost proved himself almost immediately at the start of the Summer Season. TSM didn't lose a single series until week 8, where they fell 0-2 to then ninth-place Phoenix1. That series was their only loss of the regular season, and they also nearly swept the Playoffs, defeating CLG 3-0 and then Cloud9 3-1 in the finals, qualifying them for the World Championship with North America's first seed. Bjergsen also received the Most Valuable Player award for the summer split.