2008-09: After spending two seasons with Farjestad's midget program, Nygren played for the lower division Skare BK men's club in his hometown of Karlstad. In 41 games, he scored 7 goals with 21 assists and had 32 PMs. In two games with Skare BK's U-20 squad, Nygren scored 2 goals with 3 assists.
2009-10: Nygren made his Elitserien debut, appearing in nine games with Farjestad (no points, 4 PMs) and split his season between Mora (Allsvenskan) and Skare BK. In 21 games with Mora, which finished seventh in the 14-team second division, Nygren scored 2 goals with 5 assists and had 10 PMs. In 24 games with Skare BK, Nygren scored 9 goals with 18 assists and had 10 PMs. Nygren was eligible for the 2010 NHL Draft but was not ranked among European skaters by Central Scouting and was not selected.
2010-11: Prior to the season, few observers could have predicted that Nygren would play an integral role in Farjestad's Swedish Elite league championship and later be selected in the NHL draft. Nygren split the regular season between Farjestad and Bofors (Allsvenskan) increasing his offensive output and proving a dangerous threat on the Farjestad power play – particularly in the playoffs. In 22 Elitserien regular season games, Nygren scored 4 goals (3 on the power play) with 11 assists and was -2 with 4 PMs. In the Elitserien playoffs, Nygren scored two of his three goals on the power play and added 7 assists; finishing with a +7 plus-minus in 14 games. In fact, his numbers at the Elitserien level were even better than his output with Bofors in Allsvenskan, where he scored 5 goals with 6 assists and was an even plus-minus in 35 games. Once again unranked among the top European skaters by Central Scouting prior to the draft, Nygren was selected by Montreal in the 4th round (113th overall) of the 2011 NHL Draft.
2011-12: Nygren played all but three games for the Färjestads BK (SEL) where he scored seven goals along with 11 assists and a minus 10 rating in 50 games. The offensively talented defenseman runs the power play for his team and has worked this season to play better defensively. Nygren contributed two goals for Färjestads BK in the Swedish Elite league Playoffs. The offensive defenseman wasn't able produce points on the power play similar to last season's playoffs totals.
Nygren excels with the man advantage, where he is able to get his big shot on goal with consistency and demonstrates noteworthy offensive awareness. Relatively experienced for a 2011 draftee due to his age, the Swedish blueliner still has plenty to learn on the defensive side of the game and is hampered by limited mobility. He is highly competitive however, and on the ice, is willing to do what he has to in order to help the team.
Nygren still has another year left on his contract in Sweden so the Canadiens have until June 2013 to decide if they should sign him to an entry level contract. He has the right attitude and raw talent to make the NHL, but still needs to improve his skating and defensive play.